CN215909412U - Surface cooler anti-freezing system and temperature adjusting device - Google Patents

Abstract

The utility model discloses a surface air cooler anti-freezing system and a temperature adjusting device, belonging to the technical field of surface air cooler anti-freezing, comprising any two or more subsystems of an air supply subsystem, a heating and drying subsystem and a circulating subsystem; the heating and drying subsystem comprises a preheater and/or a drying filter which are arranged between the inlet and outlet pipelines of the surface cooler; the circulation subsystem comprises a circulation pump arranged between the surface cooler inlet and outlet pipelines. The air supply subsystem provides compressed air for the surface cooler pipeline to discharge cold stored water at an elbow and a low position in the surface cooler pipeline, so that the phenomenon that the pipeline is burst due to freezing of the cold stored water in the pipeline is avoided; the heating and drying subsystem further evaporates and absorbs water in the pipeline through a preheater and/or a drying filter, so that the dryness in the pipeline is ensured; the circulating subsystem is used for accelerating the air flow and circulation in the whole circulating pipeline; a plurality of subsystems cooperate each other, can effectively avoid the frozen phenomenon of surface cooler pipeline internal storage water, guarantee air conditioning unit's steady operation.

Description

Surface cooler anti-freezing system and temperature adjusting device

Technical Field

The utility model relates to the technical field of surface cooler anti-freezing, in particular to a surface cooler anti-freezing system and a temperature adjusting device.

Background

In the chemical production process and daily life, in large places such as production workshops of chemical enterprises, hospitals, markets, conference centers, large office buildings and the like, in order to keep certain indoor temperature and cleanliness, the places generally use a central air conditioning unit to adjust the temperature, humidity and cleanliness, the air supply temperature is generally controlled between 18 ℃ and 25 ℃, cooling water, hot water or steam with certain temperature is introduced into a unit surface cooler for air conditioning refrigeration and heating, and the temperature of the air fed into the room is adjusted by cooling and heating cold water, hot water or steam in a surface cooler.

Because the outdoor temperature in winter in northern areas is lower, the lowest temperature in winter in some areas can reach about minus 30 ℃, the stored water in a coil of the surface cooler is easy to quickly cool due to the low temperature of introduced fresh air in the circulation process of the surface cooler of the air conditioning unit, so that the pipeline is frozen and blocked, and then the expansion and cracking of the pipeline are caused, the air conditioning unit is difficult to operate under the condition, most of the air conditioning units which adopt hot water and steam to heat and regulate the temperature and humidity are usually not regulated in temperature or adopt electric heating to realize heating regulation in winter, meanwhile, in order to prevent water in the coil pipe of the surface cooler from freezing, cold water in the surface cooler needs to be discharged, and because the coil pipe of the surface cooler is formed by connecting tube bundles with small pipe diameters and thin pipe walls in parallel, stored water in pipelines at part of elbows and low positions cannot be normally discharged through a discharge port on the pipeline of the surface cooler, the phenomena of freezing and bursting of the coil pipe still occur during the shutdown period, and the normal operation of equipment is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that pipelines of a surface cooler are easy to burst when the surface cooler works in a low-temperature environment in the prior art, and provides an anti-freezing system and a temperature adjusting device of the surface cooler.

The purpose of the utility model is realized by the following technical scheme: a surface cooler anti-freezing system specifically comprises any two or more subsystems of an air supply subsystem, a heating and drying subsystem and a circulating subsystem, namely the system comprises the combination of two or more subsystems; the air supply subsystem is used for providing compressed air for the surface cooler pipeline; the heating and drying subsystem comprises a preheater and/or a drying filter which are arranged between the inlet and outlet pipelines of the surface cooler; the circulation subsystem comprises a circulation pump arranged between the surface cooler inlet and outlet pipelines.

In one example, the air supply subsystem includes a surge tank connected to the surface cooler duct inlet end.

In one example, a first pressure detector is arranged on the buffer tank.

In one example, a vent valve is arranged on the buffer tank.

In one example, when the heating and drying subsystem comprises a preheater and a drying filter, the preheater and the drying filter are arranged between the surface cooler inlet and outlet pipelines in parallel.

In one example, the heating and drying subsystem further comprises a dew point detector arranged on the surface cooler pipeline.

In one example, the circulation pump outlet end is provided with a check valve.

In one example, a temperature detector and/or a second pressure detector is arranged on the surface cooler pipeline.

In one example, the system further comprises a control subsystem, wherein the output end of the control subsystem is electrically connected with the air supply subsystem, the heating and drying subsystem and the circulation subsystem.

It should be further noted that the technical features corresponding to the above examples can be combined with each other or replaced to form a new technical solution.

The utility model also comprises a temperature regulating device, which comprises the surface cooler anti-freezing system in any example.

Compared with the prior art, the utility model has the beneficial effects that:

(1) in one example, the air supply subsystem provides compressed air for the surface cooler pipeline to discharge cold water stored at an elbow and a low position in the surface cooler pipeline, so that the phenomenon that the pipeline is burst due to freezing of cold water stored in the pipeline and the normal operation of the surface cooler is influenced is avoided; the heating and drying subsystem further evaporates and absorbs water in the pipeline through a preheater and/or a drying filter, so that the dryness in the pipeline is ensured; the circulating subsystem is used for accelerating the air flow and circulation in the whole circulating pipeline; a plurality of subsystems cooperate each other, can effectively avoid the frozen phenomenon of surface cooler pipeline internal storage water, guarantee air conditioning unit's steady operation.

(2) In one example, the first pressure detector is used for collecting real-time pressure data of the buffer tank, so that the pressure value of the current compressed air can be obtained and known conveniently.

(3) In one example, the pressure regulation of the buffer tank is achieved by means of a blow valve, thereby ensuring a stable and reliable operation of the system.

(4) In one example, the preheater and the drying filter are connected in parallel to perform an air heating process or an air drying and filtering process according to the current state of the surface air cooler so as to effectively remove residual moisture in the surface air cooler.

(5) In one example, dew point data in the circulating pipeline is collected through a dew point detector, so that real-time moisture residual information in the surface air cooler pipeline is obtained, and then the working state of the corresponding subsystem is controlled, so that the freezing of the surface air cooler pipeline of the air conditioner in winter is effectively prevented.

(6) In one example, compressed air is prevented from being damaged by back-streaming to the circulation pump by the check valve.

(7) In one example, the working state of each subsystem is controlled by collecting temperature data in the pipeline through a temperature detector and collecting pressure data in the pipeline through a second pressure detector.

(8) In one example, the working states of the buffer tank, the preheater, the drying filter and the circulating pump are controlled by introducing the control subsystem, so that automatic and accurate adjustment and control are realized, and the labor cost is saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model.

FIG. 1 is a schematic diagram of a system in one example of the utility model.

In the figure: the device comprises a buffer tank 11, a first pressure detector 12, an emptying valve 13, an air inlet regulating valve 14, an air outlet regulating valve 15, a preheater 21, a drying filter 22, a dew point detector 23, a discharge valve 24, a circulating pump 31, a check valve 32, a circulating regulating valve 33, a second pressure detector 4, a surface air cooler 5 and a temperature detector 6.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships described based on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, in example 1, a surface cooler anti-freezing system specifically includes an air supply subsystem, a heating and drying subsystem, and a circulation subsystem. The air supply subsystem is used for providing compressed air for the surface cooler pipeline; the heating and drying subsystem comprises a preheater 21 and/or a drying filter 22 arranged between the inlet and outlet pipelines of the surface cooler; the circulation subsystem comprises a circulation pump 31 arranged between the inlet and outlet pipelines of the surface cooler. Specifically, the surface cooler pipeline comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline refers to a pipeline between a water supply end (cold water supply) and a water inlet end of the surface cooler, the water outlet pipeline refers to a pipeline between a water outlet end of the surface cooler and a water return end (cold water return), a discharge port is arranged on the water outlet pipeline, and a discharge valve 24 is arranged on the discharge port and used for discharging residual water in the surface cooler pipeline; the water supply end and the water return end are both provided with regulating valves, a circulation regulating valve 33 is arranged between the discharge valve 24 and the water return end regulating valve of the water outlet pipeline, and the circulation regulating valve 33 is positioned between the discharge valve 24 and the connecting pipeline (water inlet end); the water inlet pipeline and the water outlet pipeline form a water inlet and outlet pipeline of the surface cooler, the water inlet pipeline and the water outlet pipeline are connected through a connecting pipeline, and the water inlet pipeline, the water outlet pipeline and the connecting pipeline form a circulating pipeline. Further, the air conditioner comprises two surface coolers 5 which are connected in parallel, and the inlet ends and the outlet ends of the two surface coolers are provided with regulating valves, preferably electric valves; further, the preheater 21 is used for preheating the compressed air, the drying filter 22 is used for drying the circulated compressed air, and the circulating pump 31 is used for accelerating the air flow and circulation in the entire circulating duct.

In the example, the compressed air provided by the air supply subsystem discharges cold water at the elbow and the low position in the pipeline of the surface cooler, so that the phenomenon that the normal operation of the surface cooler is influenced due to the expansion crack of the pipeline caused by the freezing of the cold water in the pipeline is avoided; furthermore, the heating and drying subsystem and the circulation subsystem work in a matched mode, the temperature of air in the circulation pipeline is increased at an accelerated speed, water in sections which are easy to accumulate water, such as surface cooler coil pipes, is evaporated, then the drying agent in the drying filter 22 is used for absorbing and removing the water, and the dryness is guaranteed. The three subsystems are mutually matched, so that the phenomenon of icing of water stored in the pipeline of the surface air cooler can be effectively avoided, the pipeline is prevented from bursting, and the stable operation of the air conditioning unit is further ensured.

In one example, the air supply subsystem includes a surge tank 11, and the surge tank 11 is connected to the surface cooler duct inlet end. The buffer tank 11 is used for storing compressed air, and is provided with an air inlet regulating valve 14 and an air outlet regulating valve 15, which are preferably automatic valves, wherein the air inlet regulating valve 14 is used for controlling the introduction or the cut-off of the compressed air in the buffer tank 11, and the air outlet regulating valve 15 is used for controlling the introduction or the cut-off of the compressed air in the cooler pipeline.

In an example, the buffer tank 11 is provided with a first pressure detector 12, preferably a pressure sensor with a display function, for acquiring real-time pressure data of the buffer tank 11, so as to obtain a pressure value of the current compressed air, and avoid that the compressed air in the buffer tank 11 is too high or too low.

In one example, the buffer tank 11 is provided with an air release valve 13, and the pressure of the buffer tank 11 is adjusted through the air release valve 13, namely when the pressure in the buffer tank 11 is too high, the pressure can be reduced through the air release valve 13, so that the system can be ensured to operate stably and reliably.

In one example, when the heating and drying subsystem includes the preheater 21 and the drying filter 22, the preheater 21 and the drying filter 22 are connected in parallel between the surface air cooler inlet and outlet pipes (connecting pipes) to perform an air heating process or an air drying and filtering process according to the current state of the surface air cooler, so as to effectively remove residual moisture in the surface air cooler. Wherein, the heat source of the preheater 21 can be any one of the common heating modes such as hot water, steam or electric heater; the current state of the surface cooler refers to the current pressure, temperature and moisture residual specific conditions of a circulating pipeline of the surface cooler. More specifically, the outlet end of the dry filter 22 on the branch of the dry filter 22 is provided with a first switching regulating valve, the outlet end of the pre-heater 21 on the branch of the pre-heater 21 is provided with a second switching regulating valve, the switching regulating valve is preferably an electric one-way valve, and switching between two modes of compressed air preheating and compressed air drying is realized through two switching regulating valves.

In an example, the heating and drying subsystem further comprises a dew point detector 23 arranged on the surface cooler pipeline and used for collecting dew point data in the circulating pipeline and further acquiring real-time moisture residual information in the surface cooler pipeline and further controlling the working state of the corresponding subsystem, if the on-line data of the dew point detector 23 is greater than or equal to-35 ℃, it indicates that more residual moisture exists in the circulating pipeline, at the moment, the air intake subsystem needs to work, and cold water in a middle elbow and a low position in the circulating pipeline is discharged, so that the freezing of the surface cooler pipeline of the air conditioner in winter is effectively prevented.

In one example, the outlet end of the circulation pump 31 is provided with a check valve 32, and the check valve 32 prevents compressed air from reversely flowing to the circulation pump 31 and further damaging the circulation pump 31. More specifically, the circulation pump 31 is connected in series with both the preheater 21 and the drying filter 22, the check valve 32 is provided between the circulation pump 31 and the preheater 21 (drying filter 22), and the circulation pump 31 is provided near the return water end.

In one example, the surface cooler pipeline is provided with a temperature detector 6 and a second pressure detector 4, the temperature detector 6 is used for collecting temperature data in the surface cooler pipeline, the second pressure detector 4 is used for collecting pressure data in the pipeline, and then the working state of each subsystem is accurately controlled, and if the pressure in the circulating pipeline reaches 0.6Mpa, the heating and drying subsystem can be started to work; the preheater 21 in the heat drying subsystem can be deactivated when the temperature in the recycle line reaches 40 c. More specifically, the temperature detector 6 and the second pressure detector 4 are respectively a temperature sensor and a pressure sensor with a display function, and the second pressure sensor is arranged on the water inlet pipeline of the surface air cooler.

Further, in the above-mentioned combination of examples as a preferred embodiment, the system further includes a control subsystem, the control subsystem includes a controller, such as a siemens series PLC controller, and the controller I/O terminal is electrically connected to the air supply subsystem, the heating and drying subsystem, and the circulation subsystem, that is, the controller I/O terminal is electrically connected to the electric valve, the sensor, the circulation pump 31, and the like in the above-mentioned subsystems. Specifically, the system of the utility model adopts an electric valve, and the I/O end of the controller is electrically connected with the electric valve so as to realize the on-off control of the valve; meanwhile, the output ends (data output pins) of the temperature sensor, the pressure sensor and the dew point detector 23 are connected with an I/O end of the controller and used for transmitting the collected temperature data, pressure data and dew point data to the controller; the I/O end of the controller is also electrically connected with the circulating pump 31 and used for controlling the on-off working state of the circulating pump 31; the I/O terminal of the controller is also connected to the power supply circuit of the preheater 21 through a switch such as a contactor, that is, the I/O terminal of the controller is connected to the contactor, and the contactor is connected in series to the power supply circuit of the preheater 21, and the operating state of the preheater 21 is controlled by controlling the on/off state of the contactor. It should be noted that the connection mode of the controller, the electric valve, the sensor and the pump belongs to the common general knowledge of those skilled in the art, and the detailed descriptions of the specific models of the controller, the electric valve, the sensor and the pump are not further disclosed herein. The on-off state of the circulating pump 31, the contactor and each electric valve is controlled by introducing the controller system in the embodiment, so that the working states of the buffer tank 11, the preheater 21, the drying filter 22 and the circulating pump 31 are controlled, automatic and accurate adjustment and control are realized, and the labor cost is saved.

To better illustrate the inventive concept of the present invention, the operation principle of the system of the present invention will be described with the controller as the executing subject according to the above-mentioned preferred embodiment:

when the system is stopped, the water inlet end and the water return end regulating valves are closed, the surface cooler is disconnected with the air conditioning system at the moment, the discharge valve 24 is opened to discharge a large amount of water in the surface cooler, compressed air enters the buffer tank 11 from the outer pipe network through the air inlet regulating valve 14, the pressure of 0.6-0.8Mpa is kept (when the pressure displayed by the first pressure detector 12 is lower than 0.6Mpa, the air inlet regulating valve 14 is opened, the buffer tank 11 is inflated, when the pressure in the buffer tank 11 reaches 0.8Mpa, the air inlet regulating valve 14 is closed, air supplement is stopped, and when the pressure in the tank is higher than 1.0Mpa, the vent valve 13 is opened to release the pressure, so that the normal operation pressure of the tank body is ensured).

Compressed air enters a pipeline of the surface cooler through an air outlet and inlet valve 15, stored water in the pipeline is purged for 10-12 hours, a discharge valve 24 is closed, an outlet end adjusting valve of a drying filter 22, cold water is returned to a regulating valve (a return water end adjusting valve), a circulation adjusting valve 33 and a preheater 21 outlet end adjusting valve are opened, the surface cooler is purged as required, a corresponding inlet end adjusting valve of the surface cooler is opened, the air outlet adjusting valve 15 is closed when the internal pressure of the system reaches 0.6Mpa, a circulating pump 31 is started, the preheater 21 performs heating circulation on air in the system, when a temperature detector 6 detects that the temperature of the circulating air in the pipeline reaches 40 ℃, the air preheater 21 is stopped, the outlet end adjusting valve of the drying filter valve is opened, the outlet end adjusting valve of the preheater 21 is closed, and the air removes moisture in the air through the drying filter 22.

When the on-line data of the dew point detector 23 is more than or equal to-35 ℃, indicating that more residual moisture exists in the pipeline, opening the discharge valve 24, stopping the circulating pump 31, closing the circulating regulating valve 33, and discharging unqualified compressed air with high dew point in the pipeline; when the on-line data of the dew point detector 23 is less than or equal to minus 40 ℃, namely when little moisture remains in the pipeline, closing the discharge valve 24 and opening the circulation regulating valve 33; when the pressure of the system rises to 0.6Mpa, the compressed air circulating pump 31 is started, so that the anti-freezing compressed air in the system is in a closed circulating state; when the on-line data of the dew point detector 23 is less than or equal to minus 50 ℃, the compressed air circulating pump 31 stops running.

In one example, the utility model further comprises a temperature regulating device, wherein the temperature regulating device comprises the surface cooler anti-freezing system and the air conditioning unit in any example.

The above detailed description is for the purpose of describing the utility model in detail, and it should not be construed that the detailed description is limited to the description, and it will be apparent to those skilled in the art that various modifications and substitutions can be made without departing from the spirit of the utility model.

Claims (10)

1. The utility model provides a surface cooler anti-freezing system which characterized in that: the system comprises any two or more subsystems of a gas supply subsystem, a heating and drying subsystem and a circulating subsystem;

the air supply subsystem is used for providing compressed air for the surface cooler pipeline;

the heating and drying subsystem comprises a preheater (21) and/or a drying filter (22) arranged between the inlet and outlet pipelines of the surface cooler;

the circulation subsystem comprises a circulation pump (31) arranged between the surface cooler inlet and outlet pipelines.

2. The system of claim 1, wherein: the air supply subsystem comprises a buffer tank (11), and the buffer tank (11) is connected with the inlet end of the surface air cooler pipeline.

3. The system of claim 2, wherein: and a first pressure detector (12) is arranged on the buffer tank (11).

4. The system of claim 2, wherein: and an emptying valve (13) is arranged on the buffer tank (11).

5. The system of claim 1, wherein: when the heating and drying subsystem comprises a preheater (21) and a drying filter (22), the preheater (21) and the drying filter (22) are connected in parallel between the surface air cooler inlet and outlet pipelines.

6. The system of claim 1, wherein: the heating and drying subsystem further comprises a dew point detector (23) arranged on the surface air cooler pipeline.

7. The system of claim 1, wherein: and a check valve (32) is arranged at the outlet end of the circulating pump (31).

8. The system of claim 1, wherein: and a temperature detector (6) and/or a second pressure detector (4) are/is arranged on the surface cooler pipeline.

9. The system of claim 1, wherein: the system also comprises a control subsystem, and the output end of the control subsystem is connected with the gas supply subsystem, the heating and drying subsystem and the circulation subsystem.

10. A thermostat characterized by: the apparatus includes the surface cooler freeze protection system of any one of claims 1-9.

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