Anti-overflow expansion tank and anti-oil-overflow refrigeration temperature control system
By introducing structures such as breathing valves and check valves into the expansion tank, the thermal oil is prevented from pouring back and overflowing, and the waste and pollution of oil in the refrigeration and temperature control system is solved, and safe and reliable oil circulation management is achieved.
Patent Information
- Application Number
- CN202422610510.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-28
AI Technical Summary
In the existing refrigeration and temperature control system, the expansion tank is prone to thermal oil backflow and oil spillage, resulting in oil waste and environmental pollution.
An anti-overflow expansion tank is designed, including a liquid filling port, a breathing valve, an exhaust valve and a check valve. The liquid level is controlled through an overflow pipe and a float ball to prevent thermal oil from overflowing, and automatically flow back to the reactor when the system is backflowed.
It prevents thermal oil from spilling when the system is backflowed, avoids waste of oil and environmental pollution, and ensures the safety and economicality of the system.
Smart Images
Figure CN223307188U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cooling systems, and in particular relates to an anti-overflow expansion tank and an anti-overflow oil refrigeration temperature control system. Background Art
[0002] Ordinary expansion tanks are usually equipped with a liquid filling port, through which the required cooled or heated substances are added. The expansion tank is an important component of the thermal oil heating and cooling system. Its main function is to replenish and recover the thermal oil, balance the system pressure and discharge the gas in the reactor. In addition to the liquid filling port, it is usually also equipped with a drain port, a circulation pipeline and a liquid level gauge. The main functions of the thermal oil expansion tank can be summarized into two points. The first is the oil holding function, that is, when the system heats up, the water tank absorbs excess oil from the system due to thermal expansion; the second is the constant pressure function, that is, balancing the pressure difference between the inside and outside of the system.
[0003] The expansion water tank installed in the refrigeration temperature control system is usually equipped with a liquid filling port, and under normal circumstances it cannot be blocked because gas needs to be discharged through the liquid discharge port. In this case, thermal oil backflow and oil overflow may occur in the following two situations: (1) When the circulation pump in the refrigeration temperature control system stops due to a fault or a sudden power outage or stops working, at this time, since the entire system is still in a relatively low temperature state, and the thermal oil temperature in the reactor is relatively high, under the action of the pressure difference (especially when the height of the reactor is higher than the expansion tank), the thermal oil in the reactor will flow back into the circulation pipe and eventually return to the expansion tank. When the liquid level in the expansion tank rises to a height that overflows the liquid filling port, oil overflow will occur.
[0004] (2) When the reactor is higher than the expansion tank in actual working conditions, oil overflow and backflow are more likely to occur due to the hydraulic pressure difference between the reactor and the expansion tank. Therefore, it is very important to obtain an anti-overflow expansion tank and an anti-overflow refrigeration temperature control system that overcome the above-mentioned defects. Utility Model Content
[0005] To solve at least one of the above technical problems, on the one hand, the present invention provides an anti-overflow expansion tank, comprising an expansion tank body, the expansion tank body being provided with a liquid filling port, a breathing valve being connected to the top of the expansion tank body, a first interface and a second interface being provided on the expansion tank, and an exhaust valve and a one-way valve, wherein the first interface is connected to the inlet of the exhaust valve, and the outlet of the exhaust valve forms the exhaust port of the expansion tank; the second interface is connected to the inlet of the one-way valve, and the outlet of the one-way valve forms the main outlet of the expansion tank;
[0006] It also includes an overflow port, wherein the first interface, the overflow port and the second structure are arranged from top to bottom, and further includes an overflow pipe, wherein the overflow pipe is connected from the prime overflow port, bent upward, and then bent downward to be connected to the main outlet.
[0007] The liquid level in the expansion tank rises and submerges the float in the breathing valve, so that the float rises and sends a signal to the system so that the system controls to turn on the circulation pump.
[0008] The liquid filling port and the exhaust valve are arranged on the side of the expansion tank body.
[0009] The expansion tank of the utility model can realize automatic exhaust and prevent the heat transfer oil from overflowing from the entire system and causing losses when backflow occurs.
[0010] The expansion tank of the utility model has the same function as the expansion tank of the prior art, and can realize automatic exhaust, automatic liquid replenishment, etc. through the exhaust valve.
[0011] On the other hand, the utility model provides an anti-overflow refrigeration temperature control system, comprising the above-mentioned anti-overflow expansion tank, and also comprising a medium outlet and a medium inlet, wherein the medium inlet is sequentially connected to a cold storage tank, a circulation pump, a plate heat exchanger, a compressor, an oil separator, a condenser, a drying filter, and an expansion valve through a pipeline, and then enters the plate heat exchanger and is connected to the medium outlet;
[0012] The exhaust port is connected to the inlet of the circulation pump, and the main outlet is connected to the inlet of the circulation pump;
[0013] The main outlet is connected to the drain port of the system.
[0014] The oil separator is also connected to the compressor via a fluorine adding one-way valve.
[0015] A finned heat exchanger is also included to match the condenser.
[0016] When backflow occurs in the system, the heat transfer oil flows out from the medium inlet, flows back to the expansion tank body from the exhaust valve through the pipe between the cold storage tank and the circulation pump, and when the liquid level of the heat transfer oil in the expansion tank body rises to immerse the liquid adding port, since the liquid adding port has been sealed by the cover at this time, the heat transfer oil will not overflow from the liquid adding port, but the liquid level in the expansion tank body will continue to rise until it immerses the float in the breathing valve, causing the float to move upward, and the circulation pump will be turned on, so that the heat transfer oil can flow out of the expansion tank body, flow back to the reactor from the medium outlet through the pipe, and the one-way valve will be opened, thereby avoiding overflow of the heat transfer oil.
[0017] The expansion tank is filled with liquid through the liquid filling port and then sealed with a cover.
[0018] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, and under the premise of ensuring safety, the present invention can modify the ordinary expansion tank so that the heat transfer oil overflowing from the expansion tank due to backflow can continue to stay in the expansion tank, which neither pollutes the working environment nor causes waste of heat transfer oil, that is, no waste oil is generated. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the expansion tank structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the system structure of the utility model;
[0021] Reference numerals:
[0022] 1 Expansion tank body; 2 Liquid filling port; 3 Exhaust valve; 4 One-way valve; 5 Exhaust port; 6 Main outlet; 7 Overflow port; 8 Overflow pipe; 9 Medium outlet; 10 Medium inlet; 11 Cold storage tank; 12 Circulating pump, 13 Plate heat exchanger, 14 Compressor, 15 Oil separator, 16 Condenser, 17 Dry filter, 18 Expansion valve; 19 Drain port; 20 Finned heat exchanger; 21 Breathing valve. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the present invention and thus more clearly define the scope of protection claimed in the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementations of the present invention, which are only a portion of the embodiments of the present invention. The specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not necessarily or directly limit the scope of implementation of the present invention.
[0024] Referring to the accompanying drawings, on the one hand, the present invention provides an anti-overflow expansion tank, including an expansion tank body 1, the expansion tank body 1 is provided with a liquid filling port 2, the top of the expansion tank body is connected to a breathing valve 21, the expansion tank is provided with a first interface and a second interface, and also includes an exhaust valve 3 and a one-way valve 4, the first interface is connected to the inlet of the exhaust valve 3, and the outlet of the exhaust valve 3 forms the exhaust port 5 of the expansion tank; the second interface is connected to the inlet of the one-way valve 4, and the outlet of the one-way valve 4 forms the main outlet 6 of the expansion tank;
[0025] It also includes an overflow port 7. The first interface, the overflow port 7 and the second structure are arranged from top to bottom. It also includes an overflow pipe 8. The overflow pipe 8 is connected to the prime overflow port 7, bends upward, and then bends downward to connect to the main outlet 6.
[0026] The liquid filling port can be provided with a cover.
[0027] The breathing valve 3 is fixed to the expansion tank body 1 by welding, and the pipeline is fixed with 4-point stainless steel inner and outer wires, and the upper end is fixed with a 4-point inner wire pagoda joint.
[0028] The liquid filling port 2 is detachably connected with a cover. The breathing valve 21 adopts an existing structure with a float.
[0029] As the expansion tank body backflows, the liquid level in the expansion tank body rises, submerging the float in the breathing valve 21, so that the float rises, giving the system a signal that the expansion tank is full, so that the system controls to open the circulation pump to prevent overflow.
[0030] The liquid filling port and the exhaust valve are arranged on the side of the expansion tank body.
[0031] The expansion tank of the utility model can realize automatic exhaust and prevent the heat transfer oil from overflowing from the entire system and causing losses when backflow occurs.
[0032] The expansion tank of the present invention has the same function as the expansion tank of the prior art, and can realize automatic exhaust, automatic fluid replenishment, etc. through the exhaust valve 3 .
[0033] On the other hand, the utility model provides an anti-overflow refrigeration temperature control system, comprising the above-mentioned anti-overflow expansion tank, and also comprising a medium outlet 9 and a medium inlet 10. The medium inlet 10 is connected to a cold storage tank 11, a circulating pump 12, a plate heat exchanger 13, a compressor 14, an oil separator 15, a condenser 16, a drying filter 17, and an expansion valve 18 in sequence through a pipeline, and then enters the plate heat exchanger and is connected to the medium outlet 9.
[0034] The exhaust port 5 is connected to the inlet of the circulation pump 12, and the main outlet 6 is connected to the inlet of the circulation pump 12;
[0035] The main outlet 6 is connected to the drain port 19 of the system.
[0036] The oil separator 15 is also connected to the compressor 14 via a fluorine adding one-way valve.
[0037] A finned heat exchanger 20 is further included to cooperate with the condenser 16 .
[0038] When backflow occurs in the system, the thermal oil flows out of the medium inlet 10, through the pipe between the cold storage tank 11 and the circulation pump 12, and back to the expansion tank body 1 from the exhaust valve. When the liquid level of the thermal oil in the expansion tank body 1 rises to submerge the liquid addition port 2, because the liquid addition port 2 is now sealed with a lid, the thermal oil will not overflow from the liquid addition port 2. Instead, the liquid level in the expansion tank body 1 continues to rise until it submerges the float in the exhaust valve 3, causing the float to move upward, signaling to the system that the expansion valve body is full. At this time, the system controls the circulation pump 12 to start, allowing the thermal oil to flow out of the expansion tank body 1, through the pipe, and back to the reactor from the medium outlet 9, opening the one-way valve, thereby preventing the thermal oil from overflowing.
[0039] The expansion tank is filled with liquid through the liquid filling port and then sealed with a cover.
[0040] Before putting the system into use, check whether there is any leakage in the entire system; inject the heat transfer oil into the expansion tank through the liquid filling port 2; before starting the entire system, seal the liquid filling port 2 to prevent the heat transfer oil from overflowing.
[0041] The above-mentioned breathing valve can also be a float-type liquid level sensor. When a full signal is obtained, the system turns on the circulation pump, etc.
[0042] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, and under the premise of ensuring safety, the present invention can modify the ordinary expansion tank so that the heat transfer oil overflowing from the expansion tank due to backflow can continue to stay in the expansion tank, which neither pollutes the working environment nor causes waste of heat transfer oil, that is, no waste oil is generated.
[0043] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.
Claims
1. An anti-overflow expansion tank, characterized in that: The invention comprises an expansion tank body (1), the expansion tank body (1) is provided with a liquid filling port (2), a breathing valve (21) is connected to the top of the expansion tank body, a first interface and a second interface are provided on the expansion tank, and the expansion tank further comprises an exhaust valve (3) and a one-way valve (4), the first interface is connected to the inlet of the exhaust valve (3), and the outlet of the exhaust valve (3) forms the exhaust port (5) of the expansion tank; the second interface is connected to the inlet of the one-way valve (4), and the outlet of the one-way valve (4) forms the main outlet (6) of the expansion tank; It also includes an overflow port (7), wherein the first interface, the overflow port (7) and the second structure are arranged from top to bottom, and further includes an overflow pipe (8), wherein the overflow pipe (8) is connected to the prime overflow port (7), bent upward, and then bent downward to be connected to the main outlet (6).
2. The anti-overflow expansion tank according to claim 1, characterized in that: The liquid level in the expansion tank body (1) rises, submerging the float in the breathing valve (21) to cause the float to rise.
3. The anti-overflow expansion tank according to claim 1, characterized in that: The liquid filling port and the exhaust valve are arranged on the side of the expansion tank body.
4. An anti-oil spill refrigeration temperature control system, characterized by: The anti-overflow expansion tank comprises the anti-overflow expansion tank according to any one of claims 1 to 3, further comprising a medium outlet (9), a medium inlet (10), and further comprising a cold storage tank (11), a circulating pump (12), a plate heat exchanger (13), a compressor (14), an oil separator (15), a condenser (16), a drying filter (17), and an expansion valve (18), wherein the medium inlet (10) is connected to the cold storage tank (11), the circulating pump (12), the plate heat exchanger (13), the compressor (14), the oil separator (15), the condenser (16), the drying filter (17), and the expansion valve (18) in sequence through a pipeline, then enters the plate heat exchanger and is connected to the medium outlet (9); The exhaust port (5) is connected to the inlet of the circulation pump (12), and the main outlet (6) is connected to the inlet of the circulation pump (12); The main outlet (6) is connected to the drain outlet (19) of the system.
5. The oil spill prevention refrigeration temperature control system according to claim 4, characterized in that: The oil separator (15) is also connected to the compressor (14) via a fluorine addition one-way valve.
6. The oil spill prevention refrigeration temperature control system according to claim 4, characterized in that: The invention also comprises a finned heat exchanger (20) to match the condenser (16).
7. The oil spill prevention refrigeration temperature control system according to claim 4, characterized in that: When backflow occurs in the system, the heat transfer oil flows out from the medium inlet (10), passes through the pipeline between the cold storage tank (11) and the circulation pump (12), and flows back to the expansion tank body (1) from the exhaust valve. When the liquid level of the heat transfer oil in the expansion tank body (1) rises to immerse the liquid addition port (2), since the liquid addition port (2) has been sealed by the cover at this time, the heat transfer oil will not overflow from the liquid addition port (2), but the liquid level in the expansion tank body (1) will continue to rise until it immerses the float in the exhaust valve (3), causing the float to move upward, giving the system a signal to control the circulation pump (12) to open.
8. The oil spill prevention refrigeration temperature control system according to claim 4, characterized in that: If the circulation pump (12) is turned on, the heat transfer oil can flow out of the expansion tank body (1) and flow back to the reactor from the medium outlet (9) through the pipeline, and the one-way valve (4) is opened, thereby avoiding the overflow of the heat transfer oil.