CN204478286U - A kind of new wind and anti-freezing assists unit - Google Patents

Abstract

A fresh air antifreeze auxiliary unit relates to the field of air conditioner antifreeze, in particular to a fresh air antifreeze auxiliary unit. The utility model aims to solve the problems that the heating coils of the existing fresh air units are easily cracked by freezing and energy is wasted. A fresh air antifreeze auxiliary unit includes a heat exchanger, a first inlet pipe, a first return pipe, a second inlet pipe, a second return pipe, a pressure-stabilizing expansion regulating tank, a check valve, and two circulating pumps. One end of the heat exchanger communicates with a first inlet pipe and a first return pipe, and the other end of the heat exchanger communicates with a second inlet pipe and a second return pipe, and both the first inlet pipe and the first return pipe are filled with heat Water or steam forms the first circulation pipeline, and the second inlet pipe and the second return pipe are filled with non-corrosive antifreeze fluid to form the second circulation pipeline. Two circulating pumps and check valves are arranged in parallel on the second On the inlet pipe, a pressure-stabilizing expansion regulating tank is installed at the suction port of the circulation pump. The utility model is used in the field of air conditioner antifreeze.

Description

A fresh air antifreeze auxiliary unit

technical field

The utility model relates to the field of antifreeze for air conditioners, in particular to an auxiliary unit for fresh air antifreeze.

Background technique

In winter in the cold regions of our country, in order to meet the needs of production and life, when the outdoor fresh air enters the room through the fresh air unit, steam or hot water is usually used as the heat source to heat the coil in the fresh air unit, so as to achieve the purpose of heating the outdoor fresh air. This heating method has the following disadvantages:

1. When the steam supply system using steam as the heat source fails, the steam supply to the fresh air unit will be stopped, and the outdoor fresh air will directly contact the heating coil, the temperature inside the heating coil will drop sharply, and the heating coil will freeze and crack;

2. When the fresh air unit is not in use, because the closed air valve of the air inlet is not closed tightly, the cold air continuously penetrates into the fresh air unit. In order to ensure that the heating coil in the unit is not cracked by freezing, it is still necessary to continue to carry out maintenance on the heating coil. Heating, resulting in waste of energy;

3. When hot water is used as the heat source, when the outdoor fresh air temperature is below 0°C, in order to avoid the heating coil from being frozen and cracked, the fresh air unit must be stopped and the water in the fresh air unit’s heating coil must be drained , making the fresh air unit unusable in winter.

Utility model content

In order to solve the problem that the heating coils of the existing fresh air units are easily cracked by freezing and waste energy, the utility model further proposes an auxiliary fresh air antifreeze unit.

The technical scheme adopted by the utility model to solve the above problems is: a fresh air antifreeze auxiliary unit includes a heat exchanger, a first inlet pipe, a first return pipe, a second inlet pipe, a second return pipe, a pressure stabilizing expansion adjustment One end of the heat exchanger is connected with a first inlet pipe and a first return pipe, and the other end of the heat exchanger is connected with a second inlet pipe and a second return pipe. Both the inlet pipe and the first return pipe are fed with hot water or steam to form the first circulation pipeline, and the second inlet pipe and the second return pipe are fed with non-corrosive antifreeze fluid to form the second circulation pipeline. Two circulation pumps and check valves are arranged in parallel on the second inlet pipe, and a pressure-stabilizing expansion regulating tank is installed at the suction port of the circulation pump.

The beneficial effects of the utility model are: the utility model passes the antifreeze fluid on the secondary side of the heat exchanger, and hot water or steam on the primary side of the heat exchanger, so as to carry out the antifreeze fluid on the secondary side of the heat exchanger. Indirect heat exchange, the antifreeze fluid is transported to the heating coil of the fresh air unit to heat the outdoor fresh air entering the fresh air unit. Since the freezing point of the antifreeze fluid is very low, between -5°C and -50°C, so in cold winter , or when the outdoor fresh air temperature drops below 0°C, the heating coil will not be frozen and cracked. In the utility model, the heat exchanger is made of stainless steel, the first inlet pipe, the first return pipe, the second inlet pipe and the second return pipe are all ordinary welded pipes, the heating coil is a copper pipe, and the front and rear of the circulating pump The ends are all made of rubber soft connections, and the antifreeze fluid will not cause corrosion to these components, and has good fluidity.

The utility model is provided with a pressure-stabilizing expansion regulating box at the suction port of the circulating pump to adjust the volume change in the second circulation pipeline due to the temperature change of the antifreeze fluid, so that the pressure in the second circulation pipeline is stable, ensuring Safety of unit use.

The utility model has a wide application field, and can be connected with a fresh air unit, a combined air conditioner unit or a heat recovery unit, and can achieve a good outdoor fresh air heating antifreeze effect.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Specific embodiment 1: This embodiment is described with reference to FIG. 1. A fresh air antifreeze auxiliary unit described in this embodiment includes a heat exchanger 1, a first inlet pipe 2, a first return pipe 3, a second inlet pipe 4, The second return pipe 5, the pressure-stabilizing expansion regulating tank 6, the check valve 7 and two circulation pumps 8, one end of the heat exchanger 1 is communicated with the first inlet pipe 2 and the first return pipe 3, and the heat exchanger 1 The other end is communicated with a second inlet pipe 4 and a second return pipe 5, and hot water or steam is passed into the first inlet pipe 2 and the first return pipe 3 to form a first circulation pipeline, and the second inlet pipe 4 and the second return pipe 5 are fed with non-corrosive antifreeze fluid to form a second flow line, two circulation pumps 8 and check valve 7 are arranged in parallel on the second inlet pipe 4, and the circulation pump 8 A pressure-stabilizing expansion regulator box 6 is installed at the suction port.

In this embodiment, the first circulation pipeline and the second circulation pipeline conduct indirect heat exchange through a heat exchanger, and the function of the pressure-stabilizing expansion regulating tank 6 is to adjust the temperature of the antifreeze fluid in the second circulation pipeline. The volume change makes the pressure in the second circulation pipeline stable, ensuring the safety of the unit. Two circulating pumps 8 are set up in parallel to back up each other. When working, only one circulating pump 8 is put into use. When one of the circulating pumps 8 fails, the other circulating pump 8 can be put into use immediately without affecting the operation of the unit. The check valve 7 is set in parallel with the two circulation pumps 8. When the circulation pump 8 stops running, the antifreeze fluid can pass through the check valve 7 instantly, which prevents the impact of the liquid on the circulation pump 8 and the second circulation pipeline, thereby avoiding The damage of the circulation pump 8 and the second circulation pipeline is avoided, and the service life of the unit is improved.

Specific embodiment 2: This embodiment is described with reference to FIG. 1 . The fresh air antifreeze auxiliary unit described in this embodiment further includes a decontamination device 9 , and the decontamination device 9 is arranged between the pressure-stabilizing expansion regulating tank 6 and the circulation pump 8 . Since the antifreeze fluid circulates in the circulation pump 8, the second inlet pipe 4, the heat exchanger 1, the second return pipe 5, and the heating coil, some dust will inevitably be generated during construction and operation, and the decontamination device 9 can Filter out the dirt. Other components and connections are the same as those in the first embodiment.

Specific embodiment three: This embodiment is described with reference to FIG. 1 . The freezing point of the antifreeze fluid described in this embodiment is -5°C to -50°C. With such a setting, the antifreeze fluid can effectively adapt to the difference in the most unfavorable outdoor fresh air temperature in different cold regions, and fully ensure the fluidity and economy of the antifreeze fluid, and avoid the occurrence of frost cracking of the heating coil of the fresh air unit. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

working principle

When the utility model is working, it is connected with the fresh air unit, combined air conditioner unit or heat recovery unit. One end of the heat exchanger 1 is the primary side, and the primary side is connected with the first inlet pipe 2 and the first return pipe 3. The first Both the inlet pipe 2 and the first return pipe 3 are fed with hot water or steam to form a first circulation pipeline, the other end of the heat exchanger 1 is the secondary side, and the secondary side is connected with the second inlet pipe 4 and The second return pipe 5 , the second inlet pipe 4 and the second return pipe 5 are fed with non-corrosive antifreeze fluid to form a second flow line. The heating coil of the fresh air unit is heated through the indirect heat exchange between the first circulation pipeline and the second circulation pipeline, and the outdoor fresh air is sent to the room after being heated by the heating coil. The utility model is provided with a pressure-stabilizing expansion regulating box 6, which can adjust the volume change in the second circulation pipeline due to the change of the antifreeze fluid temperature, so that the pressure in the second circulation pipeline is stable, and the safety of the unit is guaranteed. .

Claims (3)

1. a new wind and anti-freezing assists unit, it is characterized in that: a kind of new wind and anti-freezing assists unit to comprise heat exchanger (1), first influent stream pipe (2), first return duct (3), second influent stream pipe (4), second return duct (5), voltage stabilizing expansion regulating box (6), non-return valve (7) and two circulating pumps (8), one end of heat exchanger (1) is communicated with the first influent stream pipe (2) and the first return duct (3), the other end of heat exchanger (1) is communicated with the second influent stream pipe (4) and the second return duct (5), hot water has all been passed into or steam forms the first flow pipe in first influent stream pipe (2) and the first return duct (3), all pass into non-corrosive freeze-proof liquid in second influent stream pipe (4) and the second return duct (5) and form the second flow pipe, two circulating pumps (8) and non-return valve (7) are arranged in parallel on the second influent stream pipe (4), the suction inlet place of circulating pump (8) is provided with voltage stabilizing expansion regulating box (6).

2. the new wind and anti-freezing of one according to claim 1 assists unit, it is characterized in that: the new wind and anti-freezing of described one assists unit also to comprise dirt separator (9), and dirt separator (9) is arranged between voltage stabilizing expansion regulating box (6) and circulating pump (8).

3. the new wind and anti-freezing of one according to claim 1 and 2 assists unit, it is characterized in that: the freezing point of described freeze-proof liquid is-5 DEG C ~-50 DEG C.