Anti-freezing and heat-insulating device for constant-pressure tank of air-conditioning water system

Abstract

The utility model discloses an anti-freezing and heat-insulating device for a constant-pressure tank of an air-conditioning water system, which relates to the technical field of anti-freezing of air-conditioning water systems and comprises a constant-pressure tank body. The constant-pressure tank body is installed on a water supplementing pipeline of an air conditioner water system, and a heat preservation sleeve is welded to the periphery of the constant-pressure tank body. The emptying valve is arranged at the bottom of the heat preservation sleeve, when the constant-pressure tank is shut down for a long time in winter or the temperature is extremely low, residual water in the heat preservation sleeve and the constant-pressure tank body is emptied by manually opening the emptying valve, and the frost heaving risk caused by freezing is prevented. The heat preservation sleeve is arranged on a hot water circulation pipeline of an air conditioner and comprises a hot water branch water return pipe, a sleeve body, a valve, a temperature controller and the like. Under the working condition of winter, hot water flows through the heat preservation sleeve outside the constant-pressure tank to form closed-loop circulation, and the temperature of the constant-pressure tank and the temperature of the cecum structure where the constant-pressure tank is located are maintained through waste heat of the system. Hot water circulation is beneficial for keeping the temperature of all parts in the system uniform, the heating efficiency is improved, and the frost heaving risk is prevented.

Description

Technical Field

[0001] This utility model relates to the field of antifreeze technology for air conditioning water systems, specifically to an antifreeze and heat preservation device for a pressure tank in an air conditioning water system. Background Technology

[0002] The main purpose of the antifreeze insulation device for the pressure tank in an air conditioning water system is to prevent freezing expansion of the pressure tank in low-temperature environments, ensuring stable system operation. In winter or under extreme low-temperature conditions, the water in the system can freeze due to the drop in temperature, causing it to expand in volume and potentially damaging pipes, valves, or equipment. This device prevents the water in the pressure tank from freezing through insulation measures, thus avoiding the risk of freezing expansion. The pressure tank plays a crucial role in maintaining system pressure in the air conditioning water system. By preventing freezing expansion, the pressure tank can continue to operate normally, maintaining stable system pressure. Preventing freezing expansion avoids safety accidents caused by pipe ruptures or equipment damage, improving system safety. Furthermore, preventing freezing expansion reduces damage to pipes, valves, and equipment, thereby extending the service life of these devices.

[0003] In the existing technology, the pressure tank is usually located at the highest point of the system. The water supply pipeline is led out from the pressure tank and connected to the water supply point in the system. Its other end is connected to the return water pipeline of the system, or connected to the atmosphere through a valve to form an open system. Insulation measures are usually required, such as wrapping the pipes with insulation materials to prevent heat loss and freezing. Antifreeze measures are mainly achieved by electric heating tape or adding antifreeze.

[0004] The shortcomings of the above solutions are as follows: the water supply pipeline where the pressure tank of the air conditioning water system is located is often designed as a "blind structure" (non-circulating branch pipe), which creates a dead water zone during winter operation. This causes the water inside the tank and pipeline to freeze and expand, leading to air bladder rupture or weld leakage. Antifreeze measures mainly rely on electric heating tape or adding antifreeze. However, electric heating requires continuous power supply, which is energy-intensive and poses a fire hazard. Antifreeze may corrode the pipeline and needs to be replaced regularly. The dead water problem of the "blind structure" itself is not solved. Utility Model Content

[0005] The purpose of this utility model is to provide an antifreeze and heat preservation device for the pressure tank of an air conditioning water system, so as to solve the technical problems of existing technologies, such as electric heat tracing requiring continuous power supply, high energy consumption and fire hazards, antifreeze that may corrode pipes and requires regular replacement; and failure to solve the problem of stagnant water in the "cecal structure" itself.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] An antifreeze and heat preservation device for a pressure tank in an air conditioning water system includes a pressure tank body;

[0008] The pressure tank body is installed on the air conditioning water system supply pipe, and an insulation sleeve is welded to the outer periphery of the pressure tank body;

[0009] The air conditioner is equipped with a hot water circulation pipeline, which includes an air conditioner hot water return pipe. An air conditioner hot water circulation pump is installed on the air conditioner hot water return pipe. A branch water supply pipe is led out from the air conditioner hot water return pipe. The insulation sleeve is equipped with a sleeve inlet and a sleeve outlet. The sleeve outlet is connected to the branch water return pipe. A control unit is connected to the branch water supply pipe. The control unit includes a flow regulating valve and a temperature sensor. The flow regulating valve is connected to the branch water supply pipe, and the temperature sensor is connected to the branch water supply pipe.

[0010] As a further embodiment of this utility model, the insulation sleeve is made of stainless steel.

[0011] As a further embodiment of this utility model: the inner interlayer of the insulation sleeve is filled with thick rigid polyurethane insulation material.

[0012] As a further embodiment of this utility model: the heat-insulating sleeve covers the pressure tank body, and its inner cavity forms an annular hot water channel.

[0013] As a further embodiment of this utility model, the bottom of the insulation sleeve is provided with a vent valve.

[0014] As a further embodiment of this utility model: the diameter of the branch return water pipe is one-third to one-half the diameter of the air conditioning hot water return water pipe.

[0015] As a further embodiment of this utility model: the water outlet end of the insulation sleeve is connected to the main return water pipe of the air conditioner through a branch return water pipe, forming a closed loop.

[0016] As a further embodiment of this utility model, the control unit further includes a temperature-controlled electric valve, which is configured in conjunction with a temperature sensor.

[0017] As a further embodiment of this utility model: a self-regulating electric heating cable is connected to the pressure tank body.

[0018] As a further aspect of this utility model: a temperature controller is connected to the self-regulating heating cable.

[0019] The beneficial effects of this utility model are:

[0020] 1. The insulation sleeve of this utility model is equipped with a drain valve at the bottom. In winter, when the machine is shut down for a long time or in extreme low temperatures, the drain valve can be opened manually to drain the water remaining in the insulation sleeve and the pressure tank, preventing the risk of freezing expansion caused by ice formation. The air conditioner is equipped with a hot water circulation pipeline, including an air conditioner hot water return pipe. An air conditioner hot water circulation pump is installed on the air conditioner hot water return pipe. The branch return pipe is connected to the air conditioner main return pipe to form a closed loop, ensuring that the hot water circulates in the system. The outlet of the air conditioner hot water circulation pump is connected through the air conditioner hot water return pipe. Hot water circulation helps to maintain the temperature of each part of the system uniformly and improves the heating efficiency.

[0021] 2. The pressure tank body of this utility model is connected to a self-regulating heating cable, which is connected to a thermostat. When the main system stops operating and the ambient temperature is below a certain degree, the thermostat activates the self-regulating heating cable as a backup heat source to provide heat to the pressure tank body, preventing freezing due to excessively low temperatures. The thermostat can precisely control the start and stop of the heating cable, ensuring that heat is only provided when the ambient temperature is below the set value. This avoids overheating, reduces energy waste, and extends the service life of the heating cable and the thermostat. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the pressure tank body structure in this utility model.

[0025] In the diagram: 1. Pressure tank body; 2. Insulation sleeve; 3. Air conditioning hot water return pipe; 4. Branch water supply pipe; 5. Air conditioning main return pipe; 6. Branch return pipe; 7. Flow regulating valve; 8. Temperature sensor; 9. Temperature-controlled electric valve; 10. Drain valve; 11. Self-regulating heating cable; 12. Thermostat; 13. Inlet end of sleeve; 14. Outlet end of sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1-2As shown, an antifreeze and heat preservation device for a pressure tank in an air conditioning water system includes a pressure tank body 1, which is installed on the water supply pipeline of the air conditioning water system. An insulation sleeve 2 is welded to the outer periphery of the pressure tank body 1. The insulation sleeve 2 is made of stainless steel and has a thick rigid polyurethane insulation material filling the inner layer. The insulation sleeve 2 covers the pressure tank body 1, and its inner cavity forms an annular hot water channel.

[0028] The bottom of the insulation sleeve 2 is equipped with a drain valve 10. In the event of long-term shutdown in winter or extreme low temperature, the drain valve 10 can be manually opened to drain the residual water in the insulation sleeve 2 and the pressure tank body 1, thus completely eliminating the risk of freezing expansion.

[0029] The air conditioner is equipped with a hot water circulation pipeline, which includes an air conditioner hot water return pipe 3. An air conditioner hot water circulation pump is installed on the air conditioner hot water return pipe 3. A branch water supply pipe 4 is led out from the air conditioner hot water return pipe 3. The insulation sleeve 2 is equipped with a sleeve inlet end 13 and a sleeve outlet end 14. A branch water return pipe 6 is connected to the sleeve outlet end 14. The diameter of the branch water return pipe 6 is one-third to one-half of the diameter of the air conditioner hot water return pipe 3. The sleeve outlet end 14 of the insulation sleeve 2 is connected to the air conditioner main return pipe 5 through the branch water return pipe 6, forming a closed loop. A control unit is connected to the branch water supply pipe 4. The control unit includes a flow regulating valve 7 and a temperature sensor 8. The flow regulating valve 7 is connected to the branch water supply pipe 4, and the temperature sensor 8 is connected to the branch water supply pipe 4. The control unit also includes a temperature-controlled electric valve 9, which is configured in conjunction with the temperature sensor 8. When the surface temperature of the pressure tank body 1 is lower than five degrees, the flow of the branch water supply pipe 4 is automatically opened.

[0030] The pressure tank body 1 is connected to a self-regulating electric heating cable 11, and a temperature controller 12 is connected to the self-regulating electric heating cable 11. When the main system is shut down and the ambient temperature is below 10 degrees, the self-regulating electric heating cable 11 serves as a backup heat source.

[0031] The working principle of this utility model is as follows: An insulation sleeve 2 is welded to the outer periphery of the pressure tank body 1, which effectively reduces heat loss and maintains the internal temperature of the pressure tank. A drain valve 10 is installed at the bottom of the insulation sleeve 2. During long-term shutdowns in winter or in extremely low temperatures, the drain valve 10 can be manually opened to drain any residual water in the insulation sleeve 2 and the pressure tank body 1, preventing the risk of freezing and expansion. A hot water circulation pipeline is installed on the air conditioner, including an air conditioner hot water return pipe 3. An air conditioner hot water circulation pump is installed on the air conditioner hot water return pipe 3. A branch return pipe 6 is connected to the air conditioner main return pipe 5, forming a closed loop to ensure hot water circulation in the system. When the surface temperature of the pressure tank body 1 is below five degrees Celsius, the temperature transfer... Sensor 8 detects a temperature change and automatically opens the flow regulating valve 7 of the branch water supply pipe 4 to increase the hot water flow and raise the temperature of the pressure tank body 1. The pressure tank body 1 is connected to a self-regulating heating cable 11, which is connected to a thermostat 12. When the main system is shut down and the ambient temperature is below 10 degrees Celsius, the thermostat 12 activates the self-regulating heating cable 11 as a backup heat source to provide heat to the pressure tank body 1 and prevent freezing due to excessively low temperature. This device, through multiple measures such as the insulation structure, the vent valve 10, the hot water circulation pipeline, the control unit, and the self-regulating heating cable 11, ensures that the pressure tank body 1 will not freeze in low-temperature environments, thereby ensuring the normal operation of the air conditioning water system.

[0032] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. A device for preventing freezing and maintaining heat in a pressure tank of an air conditioning water system, comprising a pressure tank body (1); characterized in that: The pressure tank body (1) is installed on the water supply pipeline of the air conditioning water system, and the pressure tank body (1) is welded with a heat insulation sleeve (2) on its outer periphery; The air conditioner is equipped with a hot water circulation pipeline, which includes an air conditioner hot water return pipe (3). An air conditioner hot water circulation pump is installed on the air conditioner hot water return pipe (3). A branch water supply pipe (4) is led out from the air conditioner hot water return pipe (3). The insulation sleeve (2) is equipped with a sleeve inlet end (13) and a sleeve outlet end (14). A branch water return pipe (6) is connected to the sleeve outlet end (14). A control unit is connected to the branch water supply pipe (4). The control unit includes a flow regulating valve (7) and a temperature sensor (8). The flow regulating valve (7) is connected to the branch water supply pipe (4), and the temperature sensor (8) is connected to the branch water supply pipe (4).

2. The antifreeze and heat preservation device for a constant pressure tank in an air conditioning water system according to claim 1, characterized in that, The insulation sleeve (2) is made of stainless steel.

3. The antifreeze and heat preservation device for a constant pressure tank in an air conditioning water system according to claim 1, characterized in that, The inner layer of the insulation sleeve (2) is filled with thick, rigid polyurethane insulation material.

4. The antifreeze and heat preservation device for a constant pressure tank in an air conditioning water system according to claim 1, characterized in that, The heat insulation sleeve (2) covers the pressure tank body (1), and its inner cavity forms an annular hot water channel.

5. The antifreeze and heat preservation device for the constant pressure tank of an air conditioning water system according to claim 1, characterized in that, The bottom of the insulation sleeve (2) is equipped with a drain valve (10).

6. The antifreeze and heat preservation device for the pressure tank of an air conditioning water system according to claim 1, characterized in that, The diameter of the branch return water pipe (6) is one-third to one-half the diameter of the air conditioning hot water return water pipe (3).

7. The antifreeze and heat preservation device for the pressure tank of an air conditioning water system according to claim 1, characterized in that, The outlet end (14) of the insulation sleeve (2) is connected to the main air conditioning return pipe (5) through the branch return pipe (6), forming a closed loop.

8. The antifreeze and heat preservation device for the pressure tank of an air conditioning water system according to claim 1, characterized in that, The control unit also includes a temperature-controlled electric valve (9), which is configured in conjunction with a temperature sensor (8).

9. The antifreeze and heat preservation device for the pressure tank of an air conditioning water system according to claim 1, characterized in that, The pressure vessel body (1) is connected to a self-regulating electric heating cable (11).

10. The antifreeze and heat preservation device for the pressure tank of an air conditioning water system according to claim 9, characterized in that, A temperature controller (12) is connected to the self-regulating heating cable (11).

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