JP2511919Y2 - Air conditioner using heat storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an air conditioner using a heat storage tank, and
The present invention relates to an improved structure of a heat medium suction side device for a heat medium temperature control device as a secondary load.

[Conventional technology]

In recent years, the usefulness of an air conditioner using a heat storage tank has been reviewed by using a heat storage adjustment contract for business, a night rate adjustment contract for business, and the like.

FIG. 2 is a conceptual diagram of an air conditioner using a conventional heat storage tank, in which a heat medium 5 having a desired capacity is provided.
Whole heat storage tank 1 that can store (usually cold and / or hot water)
Is used in a state in which the first heat storage tank 3 and the second heat storage tank 4 are divided into two parts in terms of temperature, with a substantially central portion shown by a broken line 2 as a boundary.

That is, the temperature adjusting device 6 for the heat medium 5 as the primary load
However, in the cooling mode, it is usually constituted by a refrigerator, while in the heating mode, it is constituted by a heater utilizing superheated steam, electric heat, etc., so that the foot valve 27 directly communicating with the first heat storage tank 3, Suction tube 24, electric throttle valve 25 and 1
The main suction side device composed of the secondary pump 20 sucks hot water from the first heat storage tank 3 in the cooling mode and sucks cold water from the first heat storage tank 3 in the heating mode, and directly communicates with the second heat storage tank 4.
The discharge side device including the discharge pipe 21, the temperature adjusting device 6, and the return pipe 22 of the secondary pump 20 is a heat medium 5 (cold water) adjusted to a desired temperature of the secondary load air conditioner 7 described later in the cooling mode. Also, in the heating mode, the heat medium 5 (hot water) adjusted to the desired temperature is discharged to the second heat storage tank 4 in the same manner.

In addition, one of the electric throttle valves 25 and 1 in the main suction side device
A foot valve with the other end connected to the pipe to the next pump 20.
One end of the sub-suction side device consisting of 28, the suction pipe 24 and the electric throttle valve 26 is immersed in the second heat storage tank 4 to suck up the heat medium 5 in the tank 4 and sucked up from the main suction side device. First
It was configured to join and mix with the heat medium 5 in the heat storage tank 3.

By arranging the main and sub-suction side devices in parallel and automatically adjusting the opening degree of each electric throttle valve 25, 26 so that the temperature of the heat medium 5 supplied to the temperature adjusting device 6 becomes constant. The load of the temperature control device 6 is kept constant to enable efficient temperature control operation of the refrigerator or the heater. Except for the foot valves 27 and 28 arranged in the tanks 3 and 4 of each of the main and auxiliary suction side devices, all other devices and pipes are arranged outside the entire heat storage tank 1. Was there.

Further, the heat medium 5 which is adjusted to a desired temperature by the temperature adjusting device 6 and is accommodated in the second heat storage tank 4 has another foot valve 35, a suction pipe 34, a secondary pump 30, a discharge pipe 31, an air conditioner. It is supplied to the air conditioner 7 of the secondary load, which is composed of the machine 32 and the return pipe 33. After that, the heat medium 5 whose temperature has been changed by the transfer of heat according to the cooling or heating mode to the air blown to the air conditioner 32 is returned to the first heat storage tank 3.

In the air conditioner 7 as well, except for the foot valve 35, all the other devices and pipes are arranged outside the entire heat storage tank 1 like the main and auxiliary suction side devices.

[Problems to be solved by the device]

The conventional device configured and operating as described above has the following problems.

(1) While the primary pump 20 and / or the secondary pump 30 are stopped,
When a malfunction occurs in the valve closing action of each foot valve 27, 28 and / or 35, the heat medium 5 in each suction pipe 23, 24 and / or 24 becomes 1
In some cases, due to the head difference between the temperature control device 6 for the secondary load and the air conditioner 7 for the secondary load, backflow or drop occurs in the first heat storage tank 3 and / or the second heat storage tank 4, and operation restart becomes impossible. It was easy to occur.

(2) Since all the equipment and pipes other than the foot valves 27, 28, and 35 were arranged outside the entire heat storage tank 1, a relatively large space was required outside the tank.

(3) The suction pipes 23 and 24 of the pump 20 are provided with the electric throttle valves 25 and 26 above the liquid surface of the heat medium 5, so that the effective suction height of the pump due to the increase of the resistance in each suction pipe is increased. In order to reduce the resistance, it was necessary to increase the inner diameters of the piping and throttle valve.

(4) Since the lower limit opening of each electric throttle valve is limited due to the above-mentioned resistance in the pipe, there is also a restriction on the mixing ratio adjustment for joining and mixing the heat mediums 5 having different temperatures to maintain a constant temperature. Therefore, the temperature of the heat medium 5 that is adjusted in the primary load becomes unstable, temperature unevenness of the heat medium in the heat storage tank occurs, and the heat storage effect is easily reduced.

The present invention solves the above-mentioned problems of the prior art, and provides an air conditioner using a heat storage tank having a compact configuration, which has a primary load with good operating efficiency and stable temperature control of the heat medium. That is the purpose.

[Means for solving the problem]

The object of the present invention is, in an air conditioner using a heat storage tank, suction pipes for pumping a heat medium from the heat storage tank to a heat medium temperature adjusting device as a primary side load, a primary pump, and a suction side of the primary pump. A plurality of electric throttle valves mounted in parallel with each other are respectively immersed in a heat medium in the heat storage tank to achieve an air conditioner using the heat storage tank.

〔Example〕

An embodiment of an air conditioner using the heat storage tank of the present invention will be described below in detail with reference to the accompanying drawings.

In the air conditioner using the heat storage tank of the present invention, a device other than the temperature controller for the primary load, that is, an air device for the secondary load has a mechanism substantially equivalent to that of the conventional device shown in FIG. Therefore, the description of the structure is omitted and only the temperature adjusting device 40 for the primary load according to the present invention is shown in FIG.

Similar to the conventional device shown in FIG. 2, the air conditioner 40 using the heat storage tank of the present invention shown in FIG. 1 can accommodate the heat medium 5 (usually cold water and / or hot water) of a desired capacity therein. The entire heat storage tank 1 is divided into the
The heat storage tank 3 and the second heat storage tank 4 are used in a state of being divided into two in terms of temperature.

That is, the temperature control device 40 for the heat medium 5 as the primary load
However, in the cooling mode, while it is usually composed of a refrigerator, in the heating mode, it is composed of a heater that uses steam, oil, etc., so the suction pipe 51 that directly communicates with the first heat storage tank 3 The main suction side device consisting of the throttle valve 50a and the submersible pump 52 as a primary pump sucks hot water from the first heat storage tank 3 in the cooling mode and cool water in the heating mode, and directly to the second heat storage tank 4. The discharge side device including the discharge pipe 53 of the submersible pump 52, the temperature control device 40, and the return pipe 54 which are in communication with each other is the heat medium 5 adjusted to the desired temperature of the secondary load air conditioner 7 in the cooling mode.
(Cold water), and also in the heating mode, the heat medium 5 (hot water) adjusted to the desired temperature is discharged to the second heat storage tank 4.

It should be noted that the suction pipe 55 having the other end connected to the pipe between the one electric throttle valve 50a and the submersible pump 52 in the main suction side device.
And one end of the auxiliary suction side device composed of the electric throttle valve 50b,
It is configured to be immersed in the second heat storage tank 4 to suck up the heat medium 5 in the same tank 4, and to join and mix with the heat medium 5 in the first heat storage tank 3 sucked up from the main suction side device. .

By arranging the main and sub-suction side devices in parallel and automatically adjusting the opening degree of each electric throttle valve 50a, 50b so that the temperature of the heat medium 5 supplied to the temperature control device 40 becomes constant. ,
By making the load of the temperature control device 40 constant, efficient temperature control operation of the refrigerator or the heater is possible.

As described above, the temperature adjusting device 40 for the primary load according to the present invention includes the suction pipes 51, 5 in the main and auxiliary suction side devices.
5. Each electric throttle valve 50a, 50b and submersible pump 52 as a primary pump are immersed in the heat medium 5 in each tank 3, 4, respectively, while a foot valve connected to the tip of each suction pipe Is removed.

The device of the present invention configured as described above eliminates the foot valve of the conventional device, and replaces each suction pipe 51, 55, each electric throttle valve 50.
Since the a, 50b and the submersible pump 52 as the primary pump are respectively immersed in the heat medium 5 and the main and sub-suction side devices are arranged in parallel, the inside of the pipe between each suction pipe 51, 55 and the submersible pump 52 Even if the resistance is comparatively small and therefore the piping and the pump inner diameter are reduced and the electric throttle valves 50a and 50b are throttled to a desired opening degree, the temperature control process of the heat medium 5 can be performed accurately and stably.

Next, the electric throttle valves 50a and 50b used in the present invention
The common structure will be described with reference to FIGS. 3 and 4. FIG. 3 is a front view of the entire electric throttle valve device 50 of the present invention including a valve unit 60 composed of a valve body 64 of a butterfly valve and a drive unit 70, and FIG. It is a longitudinal cross-sectional view cut along the line AA of FIG.

The valve portion 60 includes a valve body 64 formed of a butterfly valve, which is rotatably driven by a valve rod 62 and a pivot shaft 63 so that the flow passage of the valve housing member 61 can be blocked by rotation, and further on the outer peripheral surface of the valve body 64. The seat ring 65 is fitted to enhance the airtightness of the flow path of the valve housing member 61.

In addition, the upper end portion of the valve rod 62 is mounted on an outer surface of a base member 76 which constitutes a part of a driving unit 70 described later, and a hollow member of a yoke member 66 that suspends the valve housing member 61, so that the valve body is driven. It is connected to the lower end of the shaft 73.

On the other hand, in the drive unit 70, the cover member 71 and the base member 76 are fitted to each other and a seal ring 73 is provided along the fitting surface to provide a watertight countermeasure.

In the internal space defined by the cover member 71 and the base member 76, a motor 72 that rotationally drives the valve body drive shaft 73 via the speed reduction mechanism 80 is incorporated. Further, in the vicinity of the motor 72, a position limit switch 81 for detecting and controlling the valve disc open / closed position, a potentiometer 85 for feeding back the valve disc open / closed position, and protecting the motor 72 from excessive torque. The torque switch 86, the torque detection mechanism 87, and the terminal block 75 are provided.

Reduction mechanism housing with reduction mechanism 80 enclosed in a sealed state
The motor 72, the position limit switch 81, the potentiometer 85, the torque switch 86, the torque detection mechanism 87, and the terminal block 75, which are arranged at the allowable water immersion level 82 of substantially the same height as the upper surface 90a of 90, Even if water is generated from the seal ring 73 on the fitting surface between the cover member 71 and the base member 76 in the drive unit 70, the air is compressed due to the air content and the water immersion depth that are preliminarily included in the entire internal space. The inundation does not increase beyond the allowable inundation level of 82, which is determined according to the degree, and is safely stored and maintained without troubles such as electrical leakage failure and operation stoppage failure due to flooding.

Further, the drive unit 70 includes the valve body drive shaft 73 and the cable member.
An inner surface 76a of the base member 76 through which the parts 74 and the like penetrate, and each pressured air chamber 78 defined by each partition wall plate member 77 disposed above the inner side surface 76a. The pressured air chamber 78 is assembled. Due to the air pressure in the chamber 78 that has risen as a result, water is prevented from entering from the shaft sealing devices 88 and 89 in the respective penetrating portions of the base member 76 due to the valve element drive shaft 73, the cable member 74, and the like.

Further, in consideration of water leakage from each shaft sealing device 88, 89 in each pressurized air chamber 78, a plurality of water leakage sensors 84 are planted in the partition plate member 77, and a voltage is applied between the sensors 84. By detecting the weak current generated by applying the water leak, it is possible to know the proper inspection and maintenance time for the water leak of the drive unit 70.

The submersible valve drive unit 70 described above is not limited to the valve body 64 of the butterfly valve, but can be used as a two-way valve or a three-way valve such as a gate valve or a ball valve.

Furthermore, it will be easily understood that the submersible valve drive unit 70 is applied not only to the heat storage tank described above but also to other water or liquid treatment equipment.

The submersible valve drive unit 70 includes a motor 72, a position limit switch 81, and a potentiometer slightly above an allowable water immersion level 82 having a height substantially equal to the upper surface 90a of a reduction gear mechanism housing 90 in which a reduction gear mechanism 80 is enclosed. 85, torque switch 86,
By arranging the torque detection mechanism 87 and the terminal block 75, even if water leaks from the seal ring 73 on the fitting surface between the cover member 71 and the base member 76 into the drive unit 30, the inside of The inundation does not increase beyond the allowable inundation level of 82, which is determined according to the air content pre-included in the entire space and the degree of air compression due to the inundation depth. It is now possible to safely store and maintain parts that tend to cause problems such as.

The submersible valve drive unit 70 includes a valve body drive shaft 73 and a cable member 7
4, the inner surface 76a of the base member 76 and the partition plate member through which
A base formed by the valve element drive shaft 73, the cable member 74, etc., which is provided with a pressured air chamber 78 defined by 77, and the air pressure in the chamber 78 that has risen as the pressured air chamber 38 is assembled. It is possible to effectively prevent water from seeping through the member 76 from the shaft sealing devices 88 and 89.

Further, the submersible valve drive unit 70 is driven by arranging a plurality of water leak sensors 84 on the partition plate member 77 and applying a voltage between the sensors 84 to detect a weak current generated by water leak. It is possible to know the proper inspection and maintenance time for water leakage of the section 70.

〔The invention's effect〕

As described above, the air conditioner using the heat storage tank of the present invention is
It has the following novel effects.

(1) The installation space for the primary load submersible pump, piping, electric throttle valve, etc. outside the heat storage tank is not required, and it is possible to give room to the space of the air conditioner-like machine room that uses the heat storage tank. It was

(2) Since each electric throttle valve, suction pipe, and submersible pump are immersed in the heat medium in the tank, the foot valve becomes unnecessary,
It has become possible to prevent the heat medium from flowing back and falling into the tank.

(3) Since the submersible pump was adopted as the primary pump, and the suction side and discharge side piping and the electric throttle valve were also submerged in water, even if the inner diameter of the pipe and throttle valve was reduced, the pipe internal resistance was relatively low. Since it can be kept small and the electric throttle valve can be sufficiently narrowed down, the temperature medium controllability of the heat medium is improved, the occurrence of temperature unevenness in the heat storage tank can be prevented, and the heat storage effect can be improved. Became.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an air conditioner using the heat storage tank of the present invention,
2 is a conceptual view of an air conditioner using a conventional heat storage tank, FIG. 3 is a front view of the electric throttle valve device of the present invention, and FIG. 4 is a view taken along the line AA of FIG. It is the vertical cross-sectional view cut. 1 ... Whole heat storage tank 3 ... First heat storage tank 4 ... Second heat storage tank 5 ... Heat medium 6,40 ...... Primary load temperature control device 7 ... Secondary load air conditioner 20, 52 …… Primary pump 27,28,35 …… Foot valve 23,24,34,51,55 …… Suction pipe 25,26,50,50a, 50b …… Electric throttle valve 22,33 …… Return pipe 30 ...... Secondary pump 60 ...... Valve 70 ...... Drive 80 ...... Reduction mechanism 90 ...... Reduction mechanism housing

Claims (1)

(57) [Scope of utility model registration request] 1. In an air conditioner using a heat storage tank, each suction pipe for pumping a heat medium from the heat storage tank to a heat medium temperature adjusting device as a primary side load, a primary pump, and a suction side of the primary pump are parallel to each other. Mounted electric throttle valves,
An air conditioner using a heat storage tank, characterized in that each is immersed in a heat medium in the heat storage tank.