JP2500469Y2 - Hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hot water heater.

[Prior Art] A hot water heating device that performs indoor heating using hot water as a heat source includes a heating means for heating water and an indoor heat exchanger for exchanging heat between the hot water supplied from the heating means and the indoor air. Prepare

The heating means includes a combustion chamber that burns fuel, a blower that supplies combustion air to the combustion chamber, and an outdoor heat exchanger that exchanges heat between air and water heated in the combustion chamber. The outdoor heat exchanger is annularly connected to the indoor heat exchanger by hot water piping.

This heating means is housed in a casing together with a pump for circulating hot water, and is installed outdoors.

An inlet for combustion air is formed on the back surface of the casing, for example, and is covered with a cover for preventing infiltration of rainwater or the like.

[Problems to be Solved by the Invention] However, when the cover for covering the intake of combustion air is provided on the rear surface of the casing as described above, the rear surface of the casing projects rearward, so that when installing the hot water heater. ,
There is a disadvantage that a larger installation space is required.

The present invention has been made based on the above circumstances, and an object thereof is to cover the intake of combustion air without widening the installation space of the hot water heater.

[Means for Solving the Problems] The present invention employs the following technical means in order to achieve the above object.

(Claim 1) A combustion chamber for burning fuel, a blower for blowing combustion air to the combustion chamber, an outdoor heat exchanger for exchanging heat between the air heated by combustion in the combustion chamber and water, and this outdoor A hot water pipe connected to the heat exchanger, and a casing in which an inlet for combustion air is formed on one side surface, and the combustion chamber, the blower, and the outdoor heat exchanger in the casing.
And, the hot water pipe is housed, and a connection port with the outside of the hot water pipe is taken out from one side surface of the casing in which the intake port is formed and provided at a position lower than the intake port. An outdoor unit, an indoor unit having an indoor heat exchanger for exchanging heat between hot water heated by the outdoor heat exchanger and indoor air; and the outdoor unit together with the hot water pipe connected to the hot water pipe at the connection port. An outdoor pipe that annularly connects the heat exchanger and the indoor heat exchanger, and is attached to one side surface of the casing, integrally covers the intake port and the connection port, and is located below the connection port. A protective cover having an opening formed on the bottom surface and communicating with the intake is provided.

(Claim 2) A combustion chamber that burns fuel, a blower that blows combustion air to the combustion chamber, an outdoor heat exchanger that exchanges heat between air heated by combustion in the combustion chamber and water, and this outdoor A hot water pipe connected to the heat exchanger, and a casing in which an inlet for combustion air is formed on one side surface, and the combustion chamber, the blower, and the outdoor heat exchanger in the casing.
And an outdoor unit in which the hot water pipe is housed and a connection port with the outside of the hot water pipe is taken out from the inlet to the outside of the casing; hot water heated by the outdoor heat exchanger and indoor air; An indoor unit having an indoor heat exchanger for exchanging heat, and an outdoor pipe that is connected to the hot water pipe at the connection port and annularly connects the outdoor heat exchanger and the indoor heat exchanger together with the hot water pipe. A protective cover that is attached to one side surface of the casing, integrally covers the intake port and the connection port, and has an opening communicating with the intake port on a bottom surface located below the intake port; It is characterized by having.

[Operation and Effect of Invention] In the hot water heating apparatus according to claim 1, the intake port for the combustion air is formed on one side surface of the casing, so that the protective cover covering the intake port projects to the rear surface of the casing. There is no. Therefore, the depth dimension of the casing can be reduced as compared with the conventional device in which the inlet is formed on the back surface of the casing, and it is not necessary to take a large installation space for the outdoor unit.

The protective cover can integrally cover the intake port and the connection port of the hot water pipe taken out from one side of the casing where the intake port is formed. It is not necessary to separately provide a cover or the like for covering the connection port of. Also, if the connection port of the hot water pipe is taken out from the side of the casing opposite to the intake port, covering the connection port will increase the width of the casing, but in the present invention, a protective cover is integrated. By doing so, the lateral width dimension of the casing can be reduced.

Further, the protective cover has a bottom surface position where the opening is formed below the connection port of the hot water pipe, and since the intake port is formed above the connection port, the protection cover is connected to the connection port of the hot water pipe. It is possible to secure a sufficient distance from the opening to the intake by integrally covering the. As a result, even if rainwater enters the inside of the protective cover through the opening due to a crosswind, the rainwater hardly reaches the intake port, and it is possible to prevent the rainwater from entering the inside of the casing from the intake port.

The hot water heating device according to claim 2 is protected as compared with the case where the connection port is taken out from the side surface of the casing other than the intake port because the connection port of the hot water pipe is taken out from the intake port to the outside of the casing. The cover can be miniaturized. In this case, the protective cover does not become unusually large with respect to the size of the casing, and the appearance is not impaired.

[Embodiment] Next, an embodiment of an air conditioner to which the hot water heating device of the present invention is applied will be described with reference to the drawings.

 FIG. 1 is a schematic diagram of an air conditioner.

The air conditioner 1 of the present embodiment includes a cooling device 2 that performs indoor cooling by circulating a refrigerant, and a hot water heating device 3 that performs indoor heating by circulating hot water (antifreeze liquid).

The cooling device 2 is configured by a known refrigeration cycle including a refrigerant compressor 4, a refrigerant condenser 5, a capillary tube 6, a refrigerant evaporator 7, and an accumulator 8, and each of the above functional components is connected in an annular shape by a refrigerant pipe 9. Has been done.

The refrigerant compressor 4, the refrigerant condenser 5, the capillary tube 6, and the accumulator 8 together with a condenser fan 10 that blows air to the refrigerant condenser 5, and an outdoor unit case divided into two upper and lower stages by a partition plate 11 (the present invention). Casing)
It is housed on the lower side of 12.

The refrigerant evaporator 7 constitutes an indoor unit of the present invention together with an indoor fan 13 for blowing the conditioned air into the room and an indoor heat exchanger 14 for heating described later, and an indoor unit case 15
It is housed in.

The refrigerant compressor 4 and the condenser fan 10 are energized and controlled via a control circuit 16 (see FIG. 2) incorporated on the upper side of the outdoor unit case 12.

The hot water heating device 3 includes a combustor 17 for heating water, a heating indoor heat exchanger 14 for exchanging heat between hot water and indoor air supplied from the combustor 17 via a hot water pipe 18 and an outdoor pipe 44, A pump 19 for circulating hot water between the combustor 17 and the indoor heat exchanger 14 for heating, a pressure tank 20 provided downstream of the pump 19, and the like.

The combustor 17 includes a combustion chamber 22 having a burner 21 for burning fuel gas, a blower 23 for supplying combustion air to the burner 21, and air (combustion gas) heated by combustion in the burner 21 and water. It is composed of an outdoor heat exchanger 24 for heating for exchanging heat, and the outdoor heat exchanger 24 for heating is a hot water pipe.
The indoor heat exchanger 14 for heating is annularly connected via 18 and the outdoor pipe 44.

The combustor 17 constitutes the outdoor unit of the present invention together with each functional component of the refrigeration cycle except the refrigerant evaporator 7, and is housed on the upper side of the outdoor unit case 12.

The outdoor heat exchanger 24 for heating is configured by mounting a large number of heat transfer fins 24b on the outer periphery of a water pipe 24a connected to the hot water pipe 18, and is a tubular case 25 having a rectangular cross section (see FIG. 2). It is housed in.

The tubular case 25 is provided so as to communicate with the combustion chamber 22 on the other end side (the right end side in FIG. 2) of the tubular case 25, and one end side of the tubular case 25 is shown in FIG. As described above, the exhaust lid 26 having the exhaust stack 26a for discharging the combustion gas is assembled.

The combustion chamber 22 is formed in a combustor case 27 that houses the burner 21, and one end side (the left end side in FIG. 2) of the combustor case 27 is connected to the other end side of the tubular case 25. .
Further, the air outlet of the blower 23 is connected to the other end of the combustor case 27. Furthermore, in this combustor case 27,
A sparker 28, which is an ignition device for the burner 21, and a frame rod 29, which is a flame detection means, are assembled so as to be located near the flame mouth of the burner 21.

A gas pipe 30 for supplying fuel gas is connected to the burner 21. The gas pipe 30 is provided with a source solenoid valve 31 and a main solenoid valve 32 that allow the fuel gas to pass through when energized, and a governor proportional valve 33 that controls the supply pressure of the fuel gas by controlling the supply pressure from the upstream side. ing.

Blower 23, sparker 28, original solenoid valve 31, main solenoid valve above
The energization of the governor proportional valve 32 and the governor proportional valve 33 is controlled via the control circuit 16.

In this combustor 17, in order to suppress the overall height of the outdoor unit case 12 to a low level, the outdoor heat exchanger 24 for heating, the combustion chamber 22, and the blower 23 are sequentially arranged horizontally (horizontally) in the outdoor unit case 12. Has been done. The lateral width (longitudinal direction) of the outdoor unit case 12 is determined by the arrangement of the refrigeration cycle, so the outdoor heat exchanger 2 for heating the combustor 17 is used.
4, even if the combustion chamber 22 and the blower 23 are arranged horizontally,
The width of the outdoor unit case 12 does not increase.

In this embodiment, the tubular case 25
The partition plate 11 is used as a drain water tray for receiving water droplets (drain water) attached to the outer surface of the hot water pipe 18.

Therefore, in order to receive the drain water that has dripped around the partition plate 11, there is provided a step (higher in the surrounding area) of about 8 mm, and the drain water collected in the saucer is drained inside the step. There is one drainage hole 34 for this purpose.

When the pressure in the circulation path of the hot water rises, the pressure tank 20 releases the pressure and keeps the pressure in the circulation path at a predetermined value (for example, 0.9 kg / cm ² ) or less. A reserve tank 36 is connected to 20 via a hose 35.

When the pressure in the pressure tank 20 rises, the cap 20a of the pressure tank 20 opens the passage to the hose 35, and the warm water in the pressure tank 20 is reserved.
Inflow to 36.

Further, when the pressure in the pressure tank 20 decreases as the temperature in the hot water path decreases, the hot water in the reserve tank 36 flows backward and flows into the pressure tank 20.

The hot water pipe 18 is accommodated in the outdoor unit case 12, and two connection ports 18a and 18b for connecting to the outdoor pipe 44 are formed in an opening 39 formed in an upper portion of one side surface of the outdoor unit case 12.
(See FIG. 3) is taken out of the outdoor unit case 12. However, one connection port 18a is taken out straight to the side of the outdoor unit case 12 from the opening 39, while the other connection port 18b is provided downward at a position lower than the lower opening edge of the opening 39. Has been. Further, in the hot water pipe 18, an external pump (not shown) does not use the first water injection port 37 for injecting water into the hot water pipe 18 under pressure, the pump, etc., and performs water injection in a non-pressurized state. A second water injection port 38 is provided for this purpose.

The first water inlet 37 is provided downstream of the pressure tank 20, and the second water inlet 38 is provided at the pump 19 and the pressure tank 20.
Are provided between the outdoor unit case 12 and the outdoor unit case 12 through the openings 39.

In this embodiment, since the water injection from the second water injection port 38 is performed in a short time, the air vent valve 40 is provided on the top surface of the pressure tank 20.
Is provided.

The air bleeding valve 40 is connected to the reserve tank 36 via an air bleeding hose 41, and when the water is injected from the second water inlet 38, the pressure tank 20 and the reserve tank 36 are allowed to pass through the hot water pipe 18 Bleed inside.

It should be noted that the container (not shown) receives the antifreeze liquid overflowing from the reserve tank 36 at the time of water injection, and judges the completion of the water injection after the elapse of a predetermined time. It goes without saying that the antifreeze solution received in the container can be reused.

The outdoor pipe 44 is connected to the connection ports 18a and 18b of the hot water pipe 18 and connects the hot water pipe 18 and the heating outdoor heat exchanger 24 and the heating indoor heat exchanger 14 in an annular shape.

The indoor unit case 15 is a wall-mounted type, and the case 15
An indoor air intake 15a is formed in the upper part, and an air-conditioning air outlet 15b is formed in the lower front part of the case 15. A control panel (not shown) for operating the air conditioner 1 via the control circuit 16 is provided at the lateral end of the air outlet 15b.

The outdoor unit case 12 has an air inlet 12a for sucking air by the operation of the condenser fan 10 formed on a side surface and a rear surface on the lower side of the partition plate 11, and an air outlet (illustrated in the figure) on the front surface on the lower side. Not) is formed.

Further, an opening 42 (see FIG. 3) for opening and closing the above-mentioned opening 39 and the cap 20a of the pressure tank 20 is provided on the upper side surface of the outdoor unit case 12, and these opening 39, 42 is set to function as an intake for taking in combustion air accompanying the operation of the blower 23.

An exhaust port 12b for discharging the combustion gas from the exhaust pipe 26a is formed on the front surface of the upper portion of the outdoor unit case 12.

As shown in FIG. 3, a protective cover 43 made of resin is attached to the side surface of the outdoor unit case 12 in which the openings 39 and 42 are formed.

The protective cover 43 prevents the rainwater from infiltrating through the openings 39 and 42, and prevents the appearance of the exterior due to the exposed connection ports 18a and 18b of the hot water pipe 18 from being spoiled.
39, 42 and the connection ports 18a, 18b of the hot water pipe 18 are integrally covered. Further, the protective cover 43 has an opening 43 communicating with the openings 39 and 42 on the bottom surface located below the other connection port 18b.
a is formed. Therefore, the combustion air is introduced from the opening 43a of the protective cover 43, is sucked into the outdoor unit case 12 through the openings 39 and 42, and the control circuit 16
The substrate is cooled and sucked by the blower 23.

As described above, since the intake port for the combustion air is provided on the side surface of the outdoor unit case 12, the protective cover 43 that covers the intake port does not project to the back surface of the outdoor unit case 12. Therefore, it is not necessary to take a large installation space unlike the conventional device.

Further, the outdoor unit case 12 is provided with the connection ports 18a and 18b of the hot water pipe 18 through the opening 39 which functions as an intake port for the combustion air.
By adopting the structure of drawing out to the outside, the same protective cover 43 can integrally cover the intake ports (openings 39, 42) and the connection ports 18a, 18b of the hot water pipe 18. Therefore, compared with the case where the connection ports 18a and 18b of the hot water pipe 18 are pulled out from the case side surface on the side opposite to the intake port, the protection cover 18 can be integrated to reduce the number of parts and the outdoor. The width of the unit case 12 can be kept small.

Further, the protective cover 43 has a structure in which the inlet and the connection ports 18a and 18b of the hot water pipe 18 are integrally covered, and the opening 43a is formed on the bottom surface located below the other connection port 18b. The entrance can be covered over a wide range, and a sufficient distance from the opening 43a to the intake can be secured. For this reason, the opening 43
Rainwater that has entered the inside of the protective cover 43 from
It almost never reaches the openings 39, 42 formed above 3a, so that it is possible to reliably prevent water from entering into the outdoor unit case 12 from the openings 39, 42.

(Modification) In the above embodiment, the connection ports 18a and 18b of the hot water pipe 18 are taken out to the outside of the outdoor unit case 12 through the opening 39 functioning as the intake of combustion air.
If it is one side of the outdoor unit case 12 formed with,
It may be taken out to the outside of the outdoor unit case 12 at a place other than the opening 39.

Although the hot water heating device 3 of the present invention is used in combination with the cooling device 2, it goes without saying that the hot water heating device 3 can be used alone.

In addition, in order to keep the overall height of the outdoor unit case 12 low, the outdoor heat exchanger 24 for heating, which constitutes the combustor 17, and the combustion chamber
Although the 22 and the blower 23 are arranged horizontally, they may be arranged vertically (in the vertical direction).

[Brief description of drawings]

1 to 3 show the combustion apparatus of the present invention,
FIG. 1 is a schematic view of an air conditioner, FIG. 2 is a plan view of a hot water heater, and FIG. 3 is a perspective view of an air conditioner including a protective cover. 3 in the figure: Hot water heating system 12: Outdoor unit case (casing) 14: Indoor heat exchanger 18: Hot water piping 18a: One connection port 18b: Other connection port 22: Combustion chamber 23 ... … Blower 24 …… Outdoor heat exchanger 39 …… Opening (intake) 42 …… Opening (intake) 43 …… Protective cover 43a …… Opening 44 …… Outdoor piping

Claims (2)

(57) [Scope of utility model registration request] 1. A combustion chamber for combusting a fuel, a blower for blowing combustion air to the combustion chamber, and an outdoor heat exchanger for exchanging heat between air heated by combustion in the combustion chamber and water. A hot water pipe connected to the outdoor heat exchanger, and a casing in which an inlet for combustion air is formed on one side, and the combustion chamber, the blower, the outdoor heat exchanger, and the casing in the casing. An outdoor unit in which a hot water pipe is housed, and a connection port with the outside of the hot water pipe is taken out from one side surface of the casing in which the intake port is formed to a position lower than the intake port. (B) an indoor unit having an indoor heat exchanger for exchanging heat between hot water heated by the outdoor heat exchanger and indoor air; (c) being connected to the hot water pipe at the connection port to provide the hot water With piping An outdoor pipe that annularly connects the external heat exchanger and the indoor heat exchanger, and (d) is attached to one side surface of the casing to integrally cover the intake port and the connection port, and A hot water heating device comprising: a protective cover having an opening communicating with the intake on a bottom surface located below. 2. (a) A combustion chamber for burning fuel, a blower for blowing combustion air into the combustion chamber, and an outdoor heat exchanger for exchanging heat between air heated by combustion in the combustion chamber and water. A hot water pipe connected to the outdoor heat exchanger, and a casing in which an inlet for combustion air is formed on one side, and the combustion chamber, the blower, the outdoor heat exchanger, and the casing in the casing. An outdoor unit in which a hot water pipe is housed and a connection port to the outside of the hot water pipe is taken out from the inlet to the outside of the casing; and (b) hot water heated by the outdoor heat exchanger and indoors An indoor unit having an indoor heat exchanger for exchanging heat with air; and (c) being connected to the hot water pipe at the connection port, the outdoor heat exchanger and the indoor heat exchanger are annularly formed together with the hot water pipe. Outdoor delivery And (d) is attached to one side surface of the casing to integrally cover the intake port and the connection port, and an opening communicating with the intake port is formed on a bottom surface located below the intake port. Hot water heater with protective cover.