JPH06300297A - A plurality of heat sources non-pressure water heat - Google Patents

Abstract

PURPOSE:To provide a water heat device for business use which is constituted such that weight is light and an input work is easy to make and has atmosphere release structure to which a law to regulate a boiler is inapplicable, and suitable for multiapplication, such as the feed of hot water, heating, the increase of temperature. CONSTITUTION:A plurality of heat source non-pressure water warmer comprises a heat feed circuit 11 on the primary side to generate hot water; and a thermal load circuit on the secondary side (consisting of a feed hot water load part 12 and a heating temperature increase load part 13). A heat feed circuit comprises a plurality of heat sources (water heaters) 151...15n, heat-exchangers 21a and 21b, and a supply water tank 16. The above is arranged in the order of the supply water tank 16, a first circulating pump 29a, a heat source, the heat-exchangers 21a and 21b, and a motor-operated flow rate regulating valve. The thermal load circuit side is arranged in the order of first and second outlets 39a and 39b on the secondary side of first and second heat-exchangers, feed hot water temperature sensors 24a and 24b, enclosure expansion tanks 25a and 25b, a thermal load, i.e., a feed hot water load 26 and a temperature increasing load 28, second and third circulation pumps 29b and 29c, and inlets 38a and 38b on the secondary side of first and second heat-exchangers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple heat source pressureless water heater. In this specification, the term "no pressure" means a state in which the atmospheric pressure is not exceeded, and the water heater is a hot water supply load and a heating / heating temperature load in which a plurality of heat sources (for example, water heaters) are used in parallel. It is a water heater.

[0002]

2. Description of the Related Art An example of a multi-water heater commercialized by a water heater manufacturer as a commercial water heater is disclosed in JP-A-3-24.
There is a hot water supply system disclosed in Japanese Patent No. 7955 and Japanese Patent Laid-Open No. 4-39534 relating to improvement of the hot water supply system, and there is a central hot water supply device, and the central hot water supply device is hereinafter abbreviated as a multi-water heater. JP-A-3-2479
Japanese Patent Laid-Open No. 55-55 discloses a system for supplying hot water by providing a hot water storage tank in the middle of a multi-type hot water supply pipe, and although an air release valve is shown in the figure, it is understood that it is not a pressureless open type. In the one disclosed in JP-A-4-39534, a water heater is connected through a valve (manual). Hot water temperature is controlled by opening / closing the electric valve or turning the burner O
It is described that it is also possible by N / OFF.

The arrangement and shape of the fuel gas supply pipe, the combustion control, the selection control means, the abnormality occurrence detection means, the abnormality detection means from the individual control, and the pipe connection at the time of the expansion of the system are each described in Japanese Patent Laid-Open No. 4-39535, JP-A-4-39536, JP-A-4-39537, JP-A-4-39538, and JP-A-4-3953.
No. 9 and Japanese Patent Laid-Open No. 4-39567.

In the one described in JP-A-4-39535, each water heater is provided with a connecting flange, and its pipe unit is installed in the lower part of the case, and a valve (manual) is used.
The water heater is connected via. The external appearance and the internal structure are specifically illustrated.

Japanese Patent Laid-Open No. 4-39536 discloses a device in which a water heater is connected via a valve (manual) and an electric valve. Compared with the one disclosed in JP-A-4-39539, there is no description about error detection, and a valve (manual) is added. JP-A-4-39
539, 39534 and 39536.
It is understood that those disclosed in the publication are similar to each other.

In Japanese Patent Laid-Open No. 4-39537, an electric valve is attached to each water heater, the operating time of the electric valve is integrated and stored, the priority order is determined, and the number of units is controlled.
It is also described that the number of units can be controlled by the combustion amount. Obviously, the invention described in this publication relates to unit number control.

The invention described in Japanese Patent Application Laid-Open No. 4-39538 has a switching means for selecting central control or individual control when the number of water heaters is controlled by the central control, and an abnormality occurs in the central control. At this time, the water heater is operated independently by individual control. This invention also relates to unit number control.

In the invention of Japanese Patent Laid-Open No. 4-39539, an electric valve is attached to each of the connected water heaters, the hot water temperature is detected, and each valve is opened / closed (central control). The water heater whose electric valve is opened detects the flow of water by the flow rate sensor and starts the burner combustion individually (individual control). In the present invention, it is understood that the water heater is always on, the error detection is provided, and the water heater is controlled by opening and closing the electric valve.

In Japanese Patent Laid-Open No. 4-11711, two or more water heaters are connected in parallel to achieve a large capacity, and the number of units is controlled by opening and closing water supply valves individually attached according to changes in the amount of water supply. Is done by. This invention is a direct hot water system (not circulation).

In the invention of Japanese Patent Laid-Open No. 19454/1992, the circulation pipe is formed by direct hot water, but the purpose is to prevent hunting of the hot water temperature, which is different from the multi-type. A water amount sensor is provided to detect the hot water supply state and the stopped state.

The above-described multi-water heater is of the one-circuit / direct heating type direct hot water supply type, which is summarized in FIG. 3, in which 40 is a primary side circuit (hot water generator system range) and 41 is Control system, 42 ₁ ... 42n is a water heater (for example, an instantaneous water heater using gas), 43 is a water inlet, 44 is a valve, 45 is a check valve, 46 is a water supply pipe, 47 ₁ ... 47n is a valve, 48 ₁ … 48n is a valve, 49
Is a hot water supply pipe, 50 ₁ ... 50 n is a valve, and 51 ₁ ... 51 n is a hot water outlet.

The water supplied through the water receiving port 43 is supplied to the valve 44,
It flows through the check valve 45 through the pipe 46, through the valves 47 ₁ ... 47n and is supplied to the water heater 42 ₁ ... 42n where it is boiled, and the hot water flows through the valve 48 ₁ ... 48n through the pipe 49 and the valve 50 ₁ … 50
The water is discharged from the outlet 51 ₁ ... 51n via n, and the system is a non-circulating type.

In the system shown in FIG. 3, the control system 41 controls how many of the n water heaters are burnt, the operating rotation of the n water heaters, and the like. Water inlet
The water supply pressure at 43 should be 10 Kgf / cm ² or less.

The water heater shown in FIG. 3 belongs to the simple boiler section. Boilers are classified into simple boilers, small-sized boilers, small-scale boilers, and other boilers, and the standard for this classification is set as shown in FIG. 4 corresponding to the heat transfer area and pressure. In Fig. 4, the horizontal axis is the heat transfer area A (unit is m ² )
The pressure (unit: Kgf / cm ² ) is plotted on the vertical axis, and various boilers have a pressure of 1 Kgf / cm ² or less, and are divided into three according to the size of the heat transfer area. The water heater in the figure is open to the atmosphere and water is 100
Since it boils at ℃, it will not be regulated by the standards of the Industrial Safety and Health Act as long as the heat transfer area is kept within the prescribed range.

The applicant of the present invention has developed a hot water apparatus suitable for hot water supply, heating, etc. disclosed in Japanese Utility Model Publication No. 61-44113, and a further improved apparatus is a real fair 2-4300.
No. 6 publication. A hot water apparatus suitable for hot water supply, heating, etc. according to this improvement, referring to the electric circuit diagram for controlling the apparatus of FIG. 5 and FIG. 5, has a heat exchanger 63 at least in a hot water tank 62 of a hot water tank 61. A part of the hot water storage tank 62 is submerged in the high temperature water portion, and the hot water flowing from one side 71 to the other side 72 of the heat exchange pipe 64 of the heat exchanger 63 is collected to collect the hot water through the circulation pump 65. In a hot water device in which a pipe 66 is provided to discharge to a required location in 62 and a heat exchanger 63 is provided with a hot water outlet 67 and a water supply port 68, the capacity of the hot water storage tank 62 corresponds to the hot water storage amount of the storage tank. The hot water storage tank 62 also functions as a storage tank by increasing the amount of hot water to be stored, and a sensor 90 for controlling the rotation speed of the circulation pump 65 is provided near the hot water outlet 67 to set the hot water temperature. If it is higher than the temperature Tc, the rotation speed is reduced, and conversely the tap water temperature is set. A converter 89 is interposed between an inverter 91 for controlling the rotation speed of the circulation pump 65 and a sensor 90 so as to increase the rotation speed if the temperature is lower than the temperature Tc.

In FIGS. 5 and 6, 71 is an upper portion, 72 is a lower portion, 73 is an upper end portion, 74 is a curved pipe, 75 is an outer wall, 78 is a solenoid valve for water supply, 79 is a smoke chamber, 80 is an upright smoke pipe, 81 Is a burner, 82 is a peephole, 83 is a control panel, 84 is a thermometer, 85 is a diaphragm switch, 86 is an expansion tank, 87 is a hot water thermometer, 88 is a thermoswitch, 89 is a converter, 90 is a sensor, 91 is 91 Inverter, 92 no-fuse breaker, 93 electromagnetic switch for burner, 94 electromagnetic switch for circulation pump, 95 circulation pump motor, 96a
Is a push button start switch, 96b is a push button stop switch, 97 is a relay, 98a and 98b are contacts a of the relay 97, 99a, 99b and 99c are thermostats, and LS is a limit switch.

Using the water heater shown in FIGS. 5 and 6, the applicant has developed a two-circuit / indirect heating type pressureless open type single heat source pressureless water heater shown in FIG. , 100 is the primary side circuit (water heater system range), 101 is a water heater (open to the atmosphere), 102 is a burner, 103 is a makeup water inlet, 104a and 10
4b is a heat exchanger, 105a and 105b are heating loads, 106 is a closed expansion tank, 107 is a water inlet, 108 is a valve, 109 is a check valve, 110a and 110b are valves, 111a and 111b are taps, 112
Is a makeup water inlet, 113 is a valve, 114 is a check valve, 115
… 122 is piping.

The left side of the heat exchanger 104a shown in FIG. 7 is a closed circuit including two heating loads 105a and 105b arranged in parallel, and the right side circuit of the heat exchanger 104b is a hot water supply load (the hot water outlets 111a and 111b). including. Make-up water is supplied to the left closed circuit via a water inlet 112, for which a valve 113 and a check valve 114 are arranged.
The improvement of the circulation pump in this hot water apparatus was disclosed in Japanese Patent Laid-Open No. 2-146459.

The burner 102 is turned on, and the hot water boiled by the water heater 101 is heated by the circulation pumps 108a and 108c.
Between the heat exchangers 104a and 104b and the pipes 119 and 120 and the pipes 117 and 118 in the clockwise direction as indicated by the white arrow 1.
Circulates through.

The hot water discharged from the heat exchanger 104a in the closed circuit on the left side including the heat exchanger 104a is circulated by the circulation pump 108b in the clockwise direction as shown by the white arrow 2 through the pipes 121 and 122 for heat exchange. Circulating pump 108d is the hot water discharged from the vessel 104b.
Is circulated in a clockwise direction via pipes 116 and 115. In this circuit, hot water is supplied from the hot water supply loads (the hot water outlets 111a and 111b), so that tap water, for example, is supplied from the water inlet 107, and therefore a valve 108 and a check valve 109 are provided.

The water heater and the heat exchanger are shown in FIGS. 5 and 6 as well as the ordinary water heater and the shell tube (S) shown in FIG.
A hell-tube) heat exchanger may be used. In the heat exchanger 130 shown in FIG. 8, a heat medium is made to flow as indicated by an arrow 2, and water is surrounded by shells 131 in the direction of the arrow 1 to form a large number of thin tubes 132 (heat exchange pipes) (not shown in the figure for simplification). Therefore, only 4 are shown.)

[0022]

The multi-water heater shown in FIG. 3 has the following responsiveness of the hot water temperature when the heat load becomes small.
The heat source (hot water generator system range 40) and the pipes 46, 49 are small, so it is fast. The workability for carrying in is small and lightweight, and it is also possible to carry in separately. The maintainability is multiple heat sources and one unit fails. However, there is an advantage that repairs can be carried out with plenty of time without a full stop, but the response of the hot water temperature is slow when the heat load increases.
(The heat capacity is small, but it does not circulate and it is slowed down because it is boiled from cold water.) The hot water supply pressure is low because the usage pressure is limited and the usage range is narrow from the legal point of view of the water heater, and the durability of the heat source is poor. In other words, since cold water is heated to hot water and discharged, there is a large heat shock, and since it is boiled from cold water,
In particular, there is a risk that the Bunsen burner may be damaged by dew condensation in cold weather, and since tap water (fresh water) is continuously used, it is easily corroded by chlorine ions.

In addition to the above, the application is limited to a single application of hot water supply. The use depends on the structure of the water heater (material, loss pressure). The current water heater has a copper pipe structure with a monopipe heat exchange part, and has a large loss pressure, which causes problems of chlorine corrosion and erosion corrosion. It is very difficult and unrealistic to adapt the material and structure to the above problems. Therefore, the multi-water heater system is unsuitable for applications such as heating and heating.
It can only be used for the intended hot water supply of the water heater. From the viewpoint of the Occupational Safety and Health Act, it is not possible to make a water heater into a loop and create a closed circulation circuit, so it cannot be applied to commercial heating applications.

[0024] Furthermore, regarding legal regulations, the legal boiler standard may be applied depending on the total heat transfer area and operating pressure of the multiple water heaters.

Regarding the total cost (comparing two circuits), the main body cost (per output) is cheap because it has a simple structure corresponding to only one circuit, but the one-circuit local piping cost is low, but the two-circuit local piping cost is examined. And, in the water heater,
There is a problem that the total cost of the two circuit comparison is high because it is not possible to use two circuits for temperature raising applications, and in order to cope with this, it is necessary to provide a hot water storage tank and separate it from the heat source circuit.

In the single heat source pressureless water heater shown in FIG. 7, the response of the hot water temperature when the heat load is large has a large heat storage capacity and can follow an instantaneous heavy load. Since it constantly circulates, it is fast.
The pressure resistance of 115… 122 is high because it can be solved relatively easily if a pressure-compatible product is prepared in advance.
It has a wide range of uses such as heating, baths, and pool heating. The reason is as follows. For commercial use, even if the heat output is the same, there is a need for a large flow rate with a small temperature difference as in heating applications, and for pool heating, a structure that does not pose a problem even in the environment of highly concentrated chlorine water is required. It is possible to solve the problem relatively easily by preparing a specification of the exchanger corresponding to the above problem. For commercial use, a hot water supply circulation circuit is indispensable so as not to output cold water, but in the apparatus of FIG. 7, a closed circulation circuit is provided on the secondary side of the heat exchanger. The primary side circuit of the heat exchanger is a non-pressure, open air circulation circuit so that no pressure is applied to the water heater, and there is no legal or safety problem.

The heat source has good durability. It constantly circulates in hot water, the heat cycle is slow, the heat shock is small, there is no obstacle to dew condensation, and fresh water other than makeup water is not used as a heat source, so oxygen and chlorine ions are low in concentration and corrosive. It's difficult, and because it's a hot water storage type, it has a large can volume,
There is no concern about erosion corrosion because the passing speed of circulating water is small. In addition, since the use of pressureless open cans excludes the application of the law, it is not necessary to have a boiler operator.

However, in the apparatus of FIG. 7, since the heat storage capacity of the heat source (water heater 101) and the pipes 115 ... 122 is large, the response of the hot water temperature when the heat load is small is slow, and the size,
Since the weight is large and it is impossible to carry in separately, the workability of carrying in is poor,
Further, since the heat source is a single heat source, if the heat source fails, it must be completely stopped and repaired, which requires urgency and cannot afford to maintain, so maintenance is poor. Looking at the total cost (comparison of two circuits), the one-circuit local piping cost is low, and the two-circuit local piping cost is cheap because it fits in two circuits such as heating and heating without problems, but the main unit cost (per output) is Although it has a simple structure, it has a large capacity and is therefore expensive.

Therefore, the object of the present invention is to have a quick response of the hot water temperature when the heat load is large or small, a high hot water supply pressure, a versatile use, a good heat source durability, and a good carry-in capability. It is an object of the present invention to provide a hot water generator having excellent workability and maintainability, not being regulated by related laws, and having a low total cost.

[0030]

[Means for Solving the Problems] The above-mentioned problem is that the primary side of the heat exchanger (21a, 21b) is a heat supply circuit and the secondary side is a heat load circuit, and the primary side heat supply circuit is Makeup water tank (1
6), first circulation pump (29a), circulation return pipe (31), heat source (1
5 ₁ ... 15n), circulation forward piping (30), first and second heat exchanger primary side inlets (36a, 36b), first and second heat exchangers (21a, 21b), first and second Heat exchanger primary side outlet (37a, 37b), flow control valve (2
2a, 22b) and the circulation return pipe (31) are connected in this order, and the secondary side heat load circuit has the first and second heat exchanger secondary side outlets (39
a, 39b), circulation outward piping (32, 34), outlet temperature sensor (24a,
24b), closed expansion tank (25a, 25b), heat load (26, 28), circulation return pipe (33, 35), second and third circulation pumps (29b, 29c)
, A first and a second heat exchanger secondary side inlets (38a, 38b) are respectively connected in this order to solve the problem.

[0031]

In the conventional example shown in FIG. 3, the application is limited in terms of the structure and material of the water heater (allowable operating pressure and operating flow rate). In the example shown in FIG. On the other hand, the device of the present invention can handle hot water supply load and heating / heating load by using a plurality of heat sources open to the atmosphere and using a plurality of heat exchangers. It responds to requests for output and versatility. Moreover, the heat source can be added as needed, and the heat exchanger can be added within the capacity range of the heat source.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an embodiment of the present invention. In the figure, a portion 11 surrounded by a two-dot chain line is a heat supply circuit (heat exchanger 21a,
21b primary side circuit or hot water generator system range), 12
Is a hot water supply load part, 13 is a heating / heating temperature load part, and these are heat load circuits or secondary side circuits of the heat exchangers 21a and 21b. 14 is a control system, 15 ₁ ... 15n is a heat source (water heater), 16 is a makeup water tank, 16a is makeup water, 17 ₁ ... 17n is a water supply side valve,
18 ₁ ... 18n is a hot water outlet side valve, 19 is a high water level alarm device, 20 is a low water level circuit breaker, 21a is a first heat exchanger, 21b is a second heat exchanger, 22a is a first flow control valve, and 22b is a first heat exchanger. 2 flow control valves, 23
a is a water inlet for receiving water, 23b is a water inlet for receiving makeup water, 24a is a first hot water temperature sensor, 24b is a second hot water temperature sensor, 25a and 25b are first and second closed expansion tanks, and 26 is Hot water discharge load (schematically shown), 27 is hot water discharge load 26
Valve for heating, 28 is a heating / heating load (schematically shown), 29a, 29b, and 29c are first, second, and third circulation pumps, 30 is a circulation return pipe, and 31 is a circulation return pipe. , 32 and
33 is the circulation forward and return pipes on the hot water supply load side, 34
And 35 are the circulation and return pipes on the heating / heating load side, 36a and 36b are the inlets on the primary side of the first and second heat exchangers, and 37.
a and 37b are primary outlets of the first and second heat exchangers, 38a and 38b
Is the first and second heat exchanger secondary inlets, 39a and 39b are the first and second heat exchanger secondary outlets, and L is the line showing the water level in the makeup water tank.

In the multiple heat source pressureless water heater of the present invention, the primary side circuit 11 of the heat exchangers 21a and 21b is a heat supply circuit, and the secondary side circuit of the heat exchanger 21a is a hot water supply heat load circuit 12, Exchanger
The secondary side circuit of 21b is the heating / heating temperature load circuit 13.

The primary side circuit 11 includes a makeup water tank 16, a first circulation pump 29a, a circulation return pipe 31, a heat source, that is, an open-air type water heater 15 ₁ ... 15n, a circulation forward pipe 30, first and second pipes.
Heat exchanger primary inlets 36a and 36b, first and second heat exchangers
21a and 21b, first and second heat exchanger primary outlets 37a and 37b
The electrically operated first and second flow rate adjusting valves 22a and 22b and the circulation return pipe 31 are arranged in this order, and each part constitutes a pressureless open circuit connected by pipes.

Multiple (n) open-air water heaters that are heat sources
15 ₁ ... 15 n are connected in parallel, each water supply side is connected to the circulation return pipe 31, and each hot water side is connected to the circulation forward pipe 30. As each water heater, for example, a gas-fired small open-air water heater is used, but a water heater using petroleum as a fuel may be used. The point is that the service is small and easy to replace.

The heat load circuit (hot water supply load section 12 and heating / heating temperature load section 13) on the secondary side of the heat exchanger includes the first and second heat exchangers 2 and 2.
Secondary outlets 39a and 39b, circulation outflow pipes 32 and 34, first and second
Hot water temperature sensors 24a and 24b, closed expansion tanks 25a and 25
b, heat load, that is, hot water supply load 26 heating / heating load 28, circulation return pipes 33 and 35, second and third circulation pumps 29b and 29c,
The secondary inlets 38a and 38b of the first and second heat exchangers are arranged in this order, and each has a closed circuit, which can be used for hot water supply, heating, and heating load application.

Primary side circuit 11 (heat supply circuit), heat load circuit
In the hot water supply load circuit and the heating / heating temperature load circuit, make-up water is connected to the suction port of the circulation pump, and water supply is connected to the discharge port. That is, the makeup water tank 16 is connected to the suction port of the first circulation pump 29a, the water supply inlet 23a is connected to the discharge side of the second circulation pump 29b, and the makeup water is connected to the suction port of the third circulation pump 29c. Inlet 23b Connect.

The heat load circuit includes the hot water supply load unit 12 or the heating / heating unit.
Each of the temperature raising load units 13 can be used only for that purpose, and if the heat source is within the capacity range of the heat source, additional heat exchangers can be used to simultaneously supply hot water, heat, and raise the temperature (
Applications such as increasing the water temperature of the pool) can be developed according to the capacity.

In use, the hot water outlet temperatures at the secondary outlets 39a and 39b of the first and second heat exchangers are detected by the first and second hot water temperature sensors. Depending on the hot water temperature, the water heater 15 ₁ ... 15n, which is the heat source of the primary circuit, the first circulation pump 29
a. The heat flow rate is adjusted by operating the electrically driven first and second flow rate adjusting valves 22a and 22b to control the tapping temperature.
In addition, a line indicated by reference character L, that is, the makeup water tank 16
The water level of the makeup water 16a therein is kept the same as the water level of the water heaters 15 ₁ ... 15 n. Regarding the water level, a high water level alarm device 19 and a low water level circuit breaker 20 are arranged to ensure safety.

In one embodiment of the present invention, the plate heat exchanger 140 shown in FIG. 2 was used. Figure (a) shows the heat exchanger
In the perspective view of 140, the heat exchanger 140 is formed by stacking a plurality of plate-like bodies 141 shown in the plan view (b) of FIG.
Through holes 142 and 143 are formed in 1 and a groove 144 is formed on the surface. The primary medium is made to flow as indicated by an arrow 1 in the same figure (a), and the secondary medium is made to flow as indicated by an arrow 2. Figure 8
The efficiency of the heat exchanger shown in 2,000 ~ 3,000KCal / m ² · h · ℃
On the other hand, the efficiency of the plate heat exchanger is 4,000 ~
Since it is as high as 8,000 KCal / m ² · h · ° C, and it is a small and compact product, it is advantageous for downsizing the device of the present invention.

[0041] Features Referring to the apparatus of FIG. 1, it is the heat source 15 ₁ ... 15n, the heat exchanger 21a, 21b and the pipe 30
The heat capacity of 35 is small and high-temperature water is constantly circulated, so it responds quickly when the heat load increases. Also,
Due to the reason described in, the response is fast when the heat load becomes small.

The hot water supply pressure can be made high because the pressure resistance performance of the heat exchanger and the pipe can be relatively easily solved by preparing a pressure resistant one in advance.

The application is versatile such as hot water supply, heating, bathtub temperature raising, pool temperature raising. In the case of commercial use, it is necessary to have a small temperature difference and a large flow rate as in the case of heating applications, even if the heat output is the same, and a structure that does not pose a problem in the environment of high concentration chlorine water in pool heating. This problem can be solved relatively easily by preparing in advance a heat exchanger having specifications corresponding to the above problems.

For commercial use, a hot water supply circulation circuit is indispensable so that cold water is not discharged. On the other hand, the present invention addresses this by forming a closed circulation circuit on the secondary side of the heat exchanger. In addition, the heat exchanger primary side circuit is a non-pressure / atmosphere open circulation circuit so that pressure is not applied to the water heater,
The structure has no legal or safety problems.

[0045] Looking at the durability of the heat source (hot water machine 15 ₁ ... 15n), always has hot water circulation, heat cycle heat shock is small and slow, rather than damage due to condensation because the hot water is constantly circulated, Since no fresh water is used for the heat source other than makeup water, oxygen and chlorine ions are kept at a low concentration and do not corrode. Therefore, the durability of the heat source is good.

As for carrying in workability, the size of each part of the device is small,
It is lightweight and can be carried in separately, which is good.

Since a plurality of heat sources are used for maintainability, even if one of them fails, it will not be completely stopped.
It is good because you can repair it with enough time.

There is no regulation by law (Occupational Safety and Health Law, etc.). The multiple heat source cell is a water heater, but it is exempt from the law because it is a pressureless open circuit type.

The total cost (comparing two circuits) is low. The body cost (per output) is somewhat higher than for the device of FIG. This is because the device of the present invention has a structure corresponding to two circuits (the primary side circuit 11, the hot water supply load unit 12, and the heating / heating temperature load unit 13) in advance. However, the 1-circuit local piping cost is low, and the 2-circuit local piping cost is also low.
Suitable for two circuits such as heating / heating.

Tables 1 and 2 show the characteristics of the present invention described above in comparison with the characteristics of the conventional example. In Table 1 and Table 2,
(A) is the embodiment of the present invention, (B) is the conventional example device of FIG. 3, and (C) is the single heat source non-pressure water heater developed by the applicant (
It is also called a synchro boiler <registered trademark>. ) Appears.

[0051]

[Table 1]

[0052]

[Table 2]

[0053]

As described above, according to the present invention,
A pressureless hot water generator with a structure that uses multiple heat sources (hot water heaters) and connects them in parallel to form a pressureless hot water circulation circuit between the heat exchanger and the heat source side is a pressureless water heater. Therefore, the application of the boiler regulation of the Industrial Safety and Health Act is excluded, and the restricted applications are expanded compared to the conventional example configured with only a water heater,
It can be combined with various applications such as hot water supply, heating, temperature raising,
A hot water supply circulation circuit was created that was not created by legal regulation in the past, and it is possible to flow the amount of water in the heating and temperature rising areas to the heat source,
Provided is a hot water generator that is easy to carry in and install and has excellent maintainability. The heat source unit according to the present invention can use not only gas but also other fuel such as petroleum.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

2 is a diagram of the heat exchanger of FIG. 1, where FIG. 2 (a) is a perspective view of the heat exchanger, and FIG. 2 (b) is a plan view of a plate-like body of the heat exchanger of FIG. 2 (a). Is.

FIG. 3 is a diagram showing a configuration of a conventional example.

FIG. 4 is a diagram showing a hot water boiler standard.

FIG. 5 is a cross-sectional view of a hot water device developed by the applicant.

6 is a diagram of an electrical circuit for the water heating device of FIG.

FIG. 7 is a diagram showing the configuration of a single heat source pressureless water heater developed by the present applicant.

FIG. 8 is a sectional view of a conventional heat exchanger.

[Explanation of symbols]

11 Heat supply circuit (primary side circuit of heat exchanger or hot water generator system range) 12 Hot water supply load section (heat load circuit or secondary side circuit) 13 Heating / heating load section (heat load circuit or heat exchanger Two
Secondary circuit) 14 Control system 15 ₁ … 15n Heat source (water heater) 16 Makeup water tank 16a Makeup water 17 ₁ … 17n Water supply side valve 18 ₁ … 18n Hot water side valve 19 High water level alarm 20 Low water level breaker 21a 1st Heat exchanger 21b Second heat exchanger 22a First flow rate adjusting valve 22b Second flow rate adjusting valve 23a Water receiving port for receiving water 23b Water receiving port for receiving makeup water 24a First hot water temperature sensor 24b Second hot water temperature sensor 25a First sealed Expansion tank 25b Second closed expansion tank 26 Hot water supply load 27 Valve 28 Heating / heating load 29a 1st circulation pump 29b 2nd circulation pump 29c 3rd circulation pump 30 Circulation return pipe 31 Circulation return pipe 32 Circulation return pipe 32 Hot water supply load side circulation return pipe 34 Heating / heating temperature load side circulation return pipe 35 Heating / heating temperature load side circulation return pipe 36a 1st heat exchanger primary side inlet 36b 2nd heat exchanger primary side inlet 37a 1st heat Exchanger primary side outlet 37b Second heat exchanger primary side outlet 38a First heat exchanger secondary inlet 38b Second heat exchanger secondary inlet 39a First heat exchanger secondary outlet 39b Second heat exchanger secondary outlet 40 Primary heat supply circuit (hot water generator (System range) 41 Control system 42 ₁ … 42n Water heater 43 Water inlet 44 Valve 45 Check valve 46 Water supply pipe 47 ₁ … 47n Water supply side valve 48 ₁ … 48n Hot water supply side valve 49 Hot water supply pipe 50 ₁ … 50n Valve 51 ₁ … 51n Hot water outlet 61 Hot water canister 62 Hot water tank 63 Heat exchanger 64 Heat exchange pipe 65 Circulation pump 66 Piping 67 Hot water outlet 68 Water inlet 71 Upper 72 Lower 73 Upper end 74 Curved pipe 75 Outer wall 78 Water supply solenoid valve 79 Smoke chamber 80 Upright Smoke pipe 81 Burner 82 Peephole 83 Control panel 84 Thermometer 85 Diaphragm switch 86 Expansion tank 87 Hot water temperature sensor 88 Thermo switch 89 Converter 90 Hot water temperature sensor 91 Inverter 92 No fuse breaker 93 Electromagnetic switch for burner 94 Electromagnetic switch for circulation pump Unit 95 Circulation pump electric motor 96a Push button activation Switch 96b Push button stop switch 97 Relay 98a, 98b Relay 97 a contact 99 Thermostat 99a, 99b, 99c Thermostat contact 100 Primary circuit (water heater system range) 101 Hot water container 102 Burner 103 Makeup water inlet 104a, 104b Heat exchanger 105a, 105b Heating load 106 Closed expansion tank 107 Water supply inlet 108 Valve 108a… 108d Circulation pump 109 Relief valve 110a, 110b Valve 111a, 111b Outlet 112 Replenishment water inlet 113 Valve 114 Relief valve 115… 122 Piping 130 Heat exchanger 131 Shell 132 Thin tube (heat exchange pipe) 140 Plate heat exchanger 141 Plate 142, 143 Through hole 144 Groove LS Limit switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location 6909-3L F24D 17/00 P (72) Inventor Tree ▲ Gure ▼ Takashi Kawakami, Atsugi City, Kanagawa 411 Nepon Stock company Atsugi factory

Claims (6)

[Claims] 1. A primary side of the heat exchanger (21a, 21b) serves as a heat supply circuit and a secondary side serves as a heat load circuit, and the primary side heat supply circuit comprises a makeup water tank (16) and a circulation return circuit. pipe (31), the heat source (15 ₁ ... 15n), first circulation pump (29a),
Circulation return pipe (30), primary and secondary heat exchanger primary side inlet (36
a, 36b), first and second heat exchangers (21a, 21b), first and second
Heat exchanger primary side outlets (37a, 37b), flow control valves (22a, 22b)
, The circulation return pipes (31) are connected in this order, and the secondary side heat load circuit includes first and second heat exchanger secondary side outlets (39a, 39b), circulation forward pipes (32, 34), hot water discharge. Temperature sensor (24a, 24b), closed expansion tank (25a, 25b), heat load (26,
28), circulation return pipes (33, 35), second and third circulation pumps (2
9b, 29c), first and second heat exchanger secondary side inlets (38a, 38b) are connected in this order, respectively, a multiple heat source pressureless water heater. 2. In the heat supply circuit, a plurality of heat sources (15 ₁
(15n) is open to the atmosphere, they are connected in parallel, the water supply side of each heat source is connected to the circulation return pipe (31), and each hot water side is connected to the circulation return pipe (30). Multiple heat source pressureless water heater. 3. A water supply port for the heat source (15 ₁ ) and a third circulation pump (2
The multiple heat source non-pressure water heater according to claim 1, wherein makeup water is supplied to the suction port of 9c) and supply water is supplied to the discharge port of the second circulation pump (29b). 4. The secondary outlets of the first and second heat exchangers (39a, 39)
The tapping temperature of b), the heat source (15 ₁ ... 15n), first circulation pump (29a), the flow rate adjusting valve (22a, plural heat source-free pressure temperature water according to claim 1, wherein 22b) by operating the controlling the tapping temperature Machine. 5. The multiple heat source pressureless water heater according to claim 1, wherein three or more heat exchangers are provided within the capacity range of the heat source. 6. The multiple heat source pressureless water heater according to claim 1, wherein the heat exchangers (21a, 21b) are plate heat exchangers.