Take the cold and hot circuit test device

Abstract

This invention discloses a cold and heat circuit test device, comprising a cold accumulator, a cold regulating valve, a water tank containing a motor-driven heater, a circulating pump, a filter, an electric bypass valve, a heat regulating valve, and several load branches. The outlet of the cold accumulator is connected to the inlet of the cold regulating valve via a pipeline. The outlet of the cold regulating valve is connected to the inlet of the water tank via a pipeline. The outlet of the water tank is connected to the inlet of the circulating pump via a pipeline. The outlet of the circulating pump is connected to the inlet of the filter via a pipeline. The outlet of the filter is connected to the inlet of the electric bypass valve. The outlet of the filter is also connected to the inlet of each load branch. The outlet pipeline of the electric bypass valve and the outlet pipelines of each load branch are merged into a single combined pipeline, which is then connected to the inlet of the cold accumulator and the inlet of the heat regulating valve. The outlet of the heat regulating valve is connected to the inlet of the water tank via a pipeline. This invention can achieve a large temperature control range and can quickly achieve the temperature control target.

Description

Technical Field

[0001] This invention relates to the field of cold circuit devices, specifically a cold and hot circuit test device. Background Technology

[0002] Specialized industry-specific cooling loop test equipment is used to provide coolant at the target temperature to multiple parallel loads. The coolant exchanges heat with the load as it passes through, thereby heating or cooling the load to the target temperature. Existing cooling loop test equipment suffers from a limited temperature control range, while some loads require higher test temperatures (e.g., -45℃ to 55℃). Therefore, existing equipment struggles to meet these temperature control requirements. Furthermore, because the coolant temperature returning from the load may deviate significantly from the target temperature during the initial stage of coolant circulation, existing equipment requires prolonged operation to heat or cool the load to the target temperature, hindering the rapid achievement of temperature control goals. Summary of the Invention

[0003] This invention provides a cold and hot circuit test device to solve the problems of small temperature control range and difficulty in quickly achieving temperature control targets in existing cold circuit test devices.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The cold and hot circuit test device includes a cold storage (1), a cold regulating valve (2), a water tank (4), a circulating pump (5), a filter (9), an electric bypass valve (18), a heat regulating valve (20), and several load branches. The water tank (4) has a built-in electric heater (24), and each load branch includes a manual valve and a load. The outlet of the cold storage device (1) is connected to the inlet of the cold regulating valve (2) through a pipeline. The outlet of the cold regulating valve (2) is connected to the inlet of the water tank (4) through a pipeline. The outlet of the water tank (4) is connected to the inlet of the circulating pump (5) through a pipeline. The outlet of the circulating pump (5) is connected to the inlet of the filter (9) through a pipeline. The filter (9) outlet is connected to a main and branch pipeline. The main pipe in the main and branch pipeline is connected to the outlet of the filter (9). One branch pipe in the main and branch pipeline is connected to the inlet of the electric bypass valve (18). The remaining branch pipes are connected to the inlet of the manual valve in each load branch. The outlet of the manual valve in each load branch is connected to the inlet of the corresponding load through a pipeline. The outlet pipe of the electric bypass valve (18) and the outlet pipes of the loads in each load branch are combined into a combined pipe. The combined pipe is then divided into two branches. One branch is connected to the inlet of the cold storage (1), and the other branch is connected to the inlet of the heat regulating valve (20). The outlet of the heat regulating valve (20) is connected to the inlet of the water tank (4) through a pipe.

[0005] Furthermore, the cold regulating valve (2) is connected in parallel with a hand valve (3).

[0006] Furthermore, the first circulating pump (5) is connected in parallel with the second circulating pump (6).

[0007] Furthermore, the electric bypass valve (18) is connected in parallel with a manual valve four (19).

[0008] Furthermore, the thermal regulating valve (20) is connected in parallel with a manual valve five (21).

[0009] Furthermore, the outlet and inlet pipes of the cold storage unit (1) are respectively connected to self-sealing joints via bypass connections.

[0010] Furthermore, the main bypass of the main branch pipeline at the outlet of the filter (9) is connected to a filling and purging self-sealing connector (35).

[0011] Furthermore, each load branch also includes a flow meter, and the load outlet in each load branch is connected to the flow meter inlet through a pipeline. The outlet pipeline of the electric bypass valve (18) and the outlet pipeline of the flow meter in each load branch are combined into a single pipeline.

[0012] Furthermore, the bypass of the combined pipeline is connected to a self-sealing drain connector (36).

[0013] Furthermore, temperature sensors are respectively installed in the outlet pipe of the cold storage (1), the pipe between the circulating pump (5) and the filter (9), and the combined pipe; and pressure sensors are respectively installed in the pipe between the circulating pump (5) and the filter (9), the combined pipe, and the outlet pipe of the hand valve in each load branch.

[0014] In the initial stage of load cooling, this invention opens the electric bypass valve and the cold regulating valve, closes the heat regulating valve, and activates the circulation pump. Under the action of the circulation pump, the low-temperature coolant output from the accumulator at the target cooling temperature passes sequentially through the cold regulating valve, water tank, circulation pump, and filter. A portion of the low-temperature coolant passes through the electric bypass valve, while the remainder is sent to the corresponding load through the manual valves of each load branch to remove heat from the load. The coolant returning from each load and the electric bypass valve merges in the combined pipeline and returns to the accumulator. Because a portion of the low-temperature coolant output from the accumulator passes through the electric bypass valve and merges with the coolant returning from each load in the combined pipeline, the low-temperature coolant output from the accumulator can lower the temperature of the coolant returning from the load. Thus, the coolant returning to the accumulator has been pre-cooled, reducing the time required for the accumulator to re-cool the coolant and quickly achieving the temperature control target. In the subsequent stage of load cooling, since the load temperature is close to the target cooling temperature, the electric bypass valve can be closed.

[0015] During the cooling process, the water tank has a built-in heater, which heats the low-temperature coolant output from the accumulator, thus achieving a wider temperature control range during cooling.

[0016] In the initial stage of load heating, the present invention opens the heat regulation valve and the electric bypass valve, closes the cold regulation valve, and activates the circulation pump. Under the action of the circulation pump, the high-temperature coolant heated to the target heating temperature in the water tank by the electric heater passes through the circulation pump and the filter sequentially. A portion of the high-temperature coolant passes through the electric bypass valve, while the remaining high-temperature coolant is sent to the corresponding load through the manual valves of each load branch to heat the load. The coolant returned from each load and the electric bypass valve merges in the combined pipeline and returns to the water tank. Because a portion of the high-temperature coolant output from the water tank passes through the electric bypass valve and merges with the coolant returned from each load in the combined pipeline, the high-temperature coolant output from the water tank in the combined pipeline can raise the temperature of the coolant returning from the load. Thus, the coolant returning to the water tank is preheated, reducing the time required for reheating the coolant in the water tank and enabling rapid achievement of the temperature control target. In the subsequent stage of load heating, since the load temperature is close to the target heating temperature, the electric bypass valve can be closed. Furthermore, during the heating phase, the built-in heater in the water tank can heat the coolant, thereby achieving a wider temperature control range during heating.

[0017] Therefore, this invention can achieve a wide temperature control range, meeting the needs of specialized industries for large-load temperature control. Furthermore, because the returned coolant has been pre-cooled or pre-heated during the initial cooling or heating phase of this invention, the temperature control target can be achieved quickly.

[0018] In this invention, the cold regulating valve, circulating pump one, electric bypass valve, and heat regulating valve are all connected in parallel with backups, thus ensuring reliable operation. Self-sealing joints at the inlet and outlet of the cold accumulator facilitate connection of the cold accumulator to the refrigeration unit. Self-sealing joints for filling and purging in the pipeline facilitate purging of the entire piping system. Self-sealing joints for draining coolant in the pipeline facilitate drainage of the coolant from the system. Various temperature and pressure sensors facilitate monitoring of temperature and pressure throughout the circuit. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1As shown, this embodiment discloses a cold and hot circuit test device, including a cold storage 1, a cold regulating valve 2, a water tank 4, a circulating pump 5, a filter 9, an electric bypass valve 18, a heat regulating valve 20, and two load branches.

[0022] The water tank 4 has a built-in electric heater 24 for heating the coolant inside. A photoelectric level switch 25 is also installed inside the water tank 4 to monitor the coolant level. An automatic vent valve 37 is installed on the top of the water tank 4 to release any gas inside. The water tank 4 is also connected to an expansion tank 26 via piping to accommodate coolant expansion over a wide temperature range (e.g., -45℃ to 55℃).

[0023] One of the load branches includes a second hand valve 10, a self-sealing connector 11, a load 1, a second self-sealing connector 12, and a flow meter 13. The outlet of the second hand valve 10 is connected to the inlet of the first self-sealing connector 11 via a pipeline. The outlet of the first self-sealing connector 11 is connected to the inlet of the load 1 via a pipeline. The outlet of the load 1 is connected to the inlet of the second self-sealing connector 12 via a pipeline. The outlet of the second self-sealing connector 12 is connected to the inlet of the flow meter 13 via a pipeline.

[0024] Another load branch includes hand valve 3 (14), self-sealing connector 3 (15), load 2, self-sealing connector 4 (16), and flow meter 2 (17). The outlet of hand valve 3 (14) is connected to the inlet of self-sealing connector 3 (15) via a pipeline. The outlet of self-sealing connector 3 (15) is connected to the inlet of load 2 via a pipeline. The outlet of load 2 is connected to the inlet of self-sealing connector 4 (16) via a pipeline. The outlet of self-sealing connector 4 (16) is connected to the inlet of flow meter 2 (17) via a pipeline.

[0025] The outlet of the cold storage accumulator 1 is connected to the inlet of the cold regulating valve 2 via a pipeline. The outlet of the cold regulating valve 2 is connected to the inlet of the water tank 4 via a pipeline. The outlet of the water tank 4 is connected to the inlet of the circulating pump 5 via a pipeline. The outlet of the circulating pump 5 is connected to the inlet of the check valve 7 via a pipeline. The outlet of the check valve 7 is connected to the inlet of the filter 9 via a pipeline.

[0026] The outlet of filter 9 is connected to a main pipeline. The main pipeline is connected to the outlet of filter 9. One branch of the main pipeline is connected to the inlet of electric bypass valve 18, and the other two branch pipelines are connected to the inlets of manual valve 2 10 and manual valve 3 14 in the two load branches, respectively.

[0027] The outlet pipe of the electric bypass valve 18 and the outlet pipes of flow meter 13 and flow meter 17 in the two load branches are merged into a combined pipe. The combined pipe then branches into two branches. One branch is connected to the inlet of the cold storage 1, and the other branch is connected to the inlet of the heat regulating valve 20. The outlet of the heat regulating valve 20 is connected to the inlet of the water tank 4 through a pipe.

[0028] In this embodiment, the cold regulating valve 2 is connected in parallel with a manual valve 3 as a backup via a pipeline. The series branch consisting of the circulating pump 5 and the check valve 7 is connected in parallel with a series branch consisting of the circulating pump 6 and the check valve 8 as a backup via a pipeline. The electric bypass valve 18 is connected in parallel with a manual valve 19 as a backup via a pipeline. The hot regulating valve 20 is connected in parallel with a manual valve 21 as a backup. Each backup is normally closed. When one or more of the cold regulating valve 2, the circulating pump 5, the electric bypass valve 18, and the hot regulating valve 20 fail, the corresponding backup will perform the function of the failed component.

[0029] In this embodiment, a self-sealing connector 22 is connected to the bypass pipe between the outlet of the cold storage accumulator 1 and the inlet of the cold regulating valve 2, and a self-sealing connector 23 is connected to the corresponding branch bypass pipe of the inlet of the cold storage accumulator 1. The self-sealing connectors 22 and 23 enable the cold storage accumulator 1 to be quickly connected to the refrigeration device for cold storage.

[0030] In this embodiment, the main bypass of the main branch pipeline at the outlet of filter 9 is connected to a filling and purging self-sealing connector 35, and the connecting pipeline bypass is connected to a drain self-sealing connector 36. An external drain pipe can be quickly connected to the drain self-sealing connector 36 to drain any residual liquid inside the pipeline. An external filling and purging device can be quickly connected to the filling and purging self-sealing connector 35, purging the pipeline system. The purging liquid is ultimately discharged through the outlet pipeline of the drain self-sealing connector 36. This method allows for convenient and effective drainage of coolant.

[0031] In this embodiment, a temperature sensor 34 is installed in the pipeline between the outlet of the coolant accumulator 1 and the inlet of the cooling regulating valve 2; temperature sensors 28 and 29 are installed in the pipeline between the circulating pump 5 and the filter 9; and a temperature sensor 32 is installed in the combined pipeline. The coolant temperature in the pipeline can be monitored at its respective location using these temperature sensors. Temperature sensors 28 and 29 are used as backups to sense the temperature, and temperature display is achieved through control. The system only shuts down when both temperature sensors 28 and 29 fail; if only one temperature sensor fails, a fault report is issued but the system does not shut down.

[0032] In this embodiment, a pressure sensor 27 is installed in the pipeline connecting the circulating pump 5 and the filter 9; a pressure sensor 33 is installed in the combined pipeline; a pressure sensor 30 is installed in the pipeline connecting the outlet of the hand valve 10 and the inlet of the self-sealing connector 11 in the first load branch; and a pressure sensor 31 is installed in the pipeline connecting the outlet of the hand valve 14 and the inlet of the self-sealing connector 15 in the second load branch. The coolant pressure in the pipeline can be monitored at the corresponding location using these pressure sensors.

[0033] In the initial stage of load cooling, the electric bypass valve 18 and the cold regulating valve 2 are opened, while the heat regulating valve 21 is closed, and the circulation pump 5 operates. Under the action of the circulation pump 5, the low-temperature coolant output from the accumulator 1 enters the water tank 4 through the cold regulating valve 2. The low-temperature coolant is heated to the target cooling temperature by the electric heater 24 in the water tank 4, and then sent to the filter 9 through the circulation pump 5. A portion of the low-temperature coolant flowing out of the filter 9 passes through the electric bypass valve 18, while the remaining low-temperature coolant is sent to the corresponding loads 1 and 2 through the two load branches' hand valves 10 and 14 to remove the heat from loads 1 and 2. The coolant returning from loads 1 and 2 and the electric bypass valve 18 merges in the combined pipeline and returns to the accumulator 1. After loads 1 and 2 have been cooled for a period of time, since the temperatures of loads 1 and 2 are close to the target cooling temperature, the electric bypass valve 18 can be closed as needed, or the electric bypass valve 18 can be kept open.

[0034] In the initial stage of load heating, the present invention opens the thermal regulating valve 20 and the electric bypass valve 18, closes the cold regulating valve 2, and activates the circulation pump 5. Under the action of the circulation pump 5, the high-temperature coolant in the water tank 4, heated to the target heating temperature by the electric heater 24, passes through the circulation pump 5 and the filter 9 in sequence. A portion of the high-temperature coolant passes through the electric bypass valve 18, while the remaining high-temperature coolant is sent to the corresponding loads 1 and 2 through the two load branches' manual valves 10 and 14 to heat loads 1 and 2. The coolant returning from loads 1 and 2 and the electric bypass valve 18 merges in the combined pipeline and returns to the water tank 4 through the thermal regulating valve 20. After loads 1 and 2 have been heated for a period of time, since their temperatures are close to the target heating temperature, the electric bypass valve 18 can be closed as needed, or the electric bypass valve 18 can be kept open.

[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the scope or concept of the invention. The specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of the present invention, should also be considered as part of this disclosure. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0036] This invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this invention and without departing from the design idea of ​​this invention, all modifications and improvements made by those skilled in the art to the technical solutions of this invention should fall within the protection scope of this invention. The technical content for which protection is sought in this invention has been fully described in the claims.

Claims

1. A cold and hot circuit test apparatus, characterized in that, It includes a cold storage unit (1), a cold regulating valve (2), a water tank (4), a circulating pump (5), a filter (9), an electric bypass valve (18), a heat regulating valve (20), and several load branches. The water tank (4) has a built-in electric heater (24), and each load branch includes a manual valve and a load. The outlet of the cold storage device (1) is connected to the inlet of the cold regulating valve (2) through a pipeline. The outlet of the cold regulating valve (2) is connected to the inlet of the water tank (4) through a pipeline. The outlet of the water tank (4) is connected to the inlet of the circulating pump (5) through a pipeline. The outlet of the circulating pump (5) is connected to the inlet of the filter (9) through a pipeline. The filter (9) outlet is connected to a main and branch pipeline. The main pipe in the main and branch pipeline is connected to the outlet of the filter (9). One branch pipe in the main and branch pipeline is connected to the inlet of the electric bypass valve (18). The remaining branch pipes are connected to the inlet of the manual valve in each load branch. The outlet of the manual valve in each load branch is connected to the inlet of the corresponding load through a pipeline. The outlet pipe of the electric bypass valve (18) and the outlet pipes of the loads in each load branch are combined into a combined pipe. The combined pipe is then divided into two branches. One branch is connected to the inlet of the cold storage (1), and the other branch is connected to the inlet of the heat regulating valve (20). The outlet of the heat regulating valve (20) is connected to the inlet of the water tank (4) through a pipe.

2. The hot and cold circuit test device according to claim 1, characterized in that, The cold regulating valve (2) is connected in parallel with a hand valve (3).

3. The hot and cold circuit test apparatus according to claim 1, characterized in that, The circulating pump one (5) is connected in parallel with the circulating pump two (6).

4. The hot and cold circuit test apparatus according to claim 1, characterized in that, The electric bypass valve (18) is connected in parallel with a manual valve four (19).

5. The hot and cold circuit test apparatus according to claim 1, characterized in that, The thermal regulating valve (20) is connected in parallel with a manual valve five (21).

6. The hot and cold circuit test apparatus according to claim 1, characterized in that, The outlet and inlet pipes of the cold accumulator (1) are respectively connected to self-sealing joints via bypass connections.

7. The hot and cold circuit test apparatus according to claim 1, characterized in that, The main bypass of the main branch pipeline at the outlet of the filter (9) is connected to a filling and purging self-sealing connector (35).

8. The hot and cold circuit test apparatus according to claim 1, characterized in that, Each load branch also includes a flow meter. The load outlet in each load branch is connected to the flow meter inlet through a pipeline. The outlet pipeline of the electric bypass valve (18) and the outlet pipeline of the flow meter in each load branch are combined into a single pipeline.

9. The hot and cold circuit test apparatus according to claim 1 or 8, characterized in that, The bypass of the combined pipeline is connected to a self-sealing drain connector (36).

10. The hot and cold circuit test apparatus according to claim 1, characterized in that, Temperature sensors are installed on the outlet pipe of the cold storage unit (1), the pipe between the circulating pump (5) and the filter (9), and the combined pipe; and pressure sensors are installed on the pipe between the circulating pump (5) and the filter (9), the combined pipe, and the outlet pipe of the hand valve in each load branch.

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