Heat pump energy-saving system for laboratory

Abstract

The utility model relates to the technical field of heat pumps, in particular to a heat pump energy-saving system for a laboratory, which comprises an environment temperature control unit used for adjusting the temperature of the laboratory. The circulating water unit comprises a water storage tank and a test water pump, the water storage tank is communicated with the test water pump, and the test water pump is communicated with a water inlet of a test machine located in the laboratory; the water chiller-heater unit is communicated with the water storage tank; the cooling unit is communicated with the water storage tank; a three-way control valve is arranged between the recovery air disc and the testing machine; and the temperature acquisition device is arranged in the laboratory, and the temperature acquisition device is electrically connected with the three-way control valve. According to the utility model, the energy consumption in the testing process can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump energy-saving system for laboratories. Background Art

[0002] When testing the test machines of central air conditioners or heat pumps in a laboratory, it is necessary to control the temperature of the environment and the temperature of the test machines to achieve tests at different temperatures. The test system in the laboratory includes a hot and cold air working condition machine and a circulating water system. Among them, the hot and cold air working condition machine is used to adjust the temperature of the laboratory to simulate different ambient temperatures. The circulating water system is connected to the test machine for testing. In the prior art, during the heating test of the test machine and the refrigeration test of the unit in the laboratory, a large amount of hot water and cold water will be generated in the laboratory. The traditional laboratory dissipates the hot water or cold water generated during the experiment into the air through a cooling tower and cannot be recycled, resulting in high energy consumption during the test process.

[0003] Therefore, a heat pump energy-saving system for laboratories is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a heat pump energy-saving system for laboratories, which can reduce the energy consumption during the test process.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The heat pump energy-saving system for laboratories includes:

[0007] An environmental temperature control unit, which is used to adjust the temperature of the laboratory;

[0008] A circulating water unit, including a water storage tank and a test water pump. The water storage tank is connected to the test water pump, and the test water pump is connected to the water inlet of the test machine located in the laboratory;

[0009] A hot and cold water unit, which is connected to the water storage tank and is used to heat or cool the water in the water storage tank;

[0010] A cooling unit, which is connected to the water storage tank and is used to cool the water in the water storage tank;

[0011] A recovery air handling unit. A three-way control valve is arranged between the recovery air handling unit and the test machine. The first port of the three-way control valve is connected to the water outlet of the test machine, the second port of the three-way control valve is connected to the water inlet of the recovery air handling unit, and the third port of the three-way control valve is connected to the water storage tank and the water outlet of the recovery air handling unit;

[0012] The temperature acquisition device is arranged in the laboratory, and the temperature acquisition device is electrically connected to the three-way control valve.

[0013] Further, the cooling unit includes a cooling water pump and a cooling tower that are connected in sequence, and both the cooling water pump and the cooling tower are connected to the water storage tank.

[0014] Further, the cold and hot water unit includes a unit water tank and a working condition water pump, and the unit water tank, the working condition water pump and the water storage tank are connected in series.

[0015] Further, the environmental temperature control unit includes a cold and hot air working condition outdoor unit and a cold and hot air working condition indoor unit that are connected to each other, and the cold and hot air working condition indoor unit is located in the laboratory.

[0016] Further, an anti-freezing component is further included, and the anti-freezing component is connected to the recovered air coil for draining the water in the recovered air coil.

[0017] Further, the anti-freezing component includes an air inflation component, a drainage component and a switching valve. Both the air inflation component and the drainage component are connected to the recovered air coil, and the switching valve is arranged at the water outlet of the recovered air coil.

[0018] Further, the anti-freezing component further includes a temperature control switch, the temperature control switch is arranged on the recovered air coil, and the temperature control switch is electrically connected to the air inflation component, the switching valve and the drainage component.

[0019] Further, the air inflation component includes an air compressor, the air compressor is connected to the recovered air coil through an air charging pipe, and the air compressor is electrically connected to the temperature control switch.

[0020] Further, the drainage component includes a drainage pipeline, a switching control valve is arranged on the drainage pipeline, the drainage pipeline is connected to the recovered air coil, and the switching control valve is electrically connected to the temperature control switch.

[0021] Further, a heater is arranged in the water storage tank.

[0022] The beneficial effects of the present utility model:

[0023] A heat pump energy-saving system for laboratories provided by the present utility model. The environmental temperature control unit is used to adjust the temperature of the laboratory, and the cold and hot water unit and the cooling unit can control the water temperature of the water storage tank of the circulating water unit. A three-way control valve is arranged between the water storage tank, the return air disc and the testing machine. The first port of the three-way control valve is communicated with the water outlet of the testing machine, the second port of the three-way control valve is communicated with the water inlet of the return air disc, and the third port of the three-way control valve is communicated with the water outlet of the water storage tank and the return air disc. A temperature acquisition device is arranged in the laboratory, and the temperature acquisition device is electrically connected with the three-way control valve. During the testing process, the environmental temperature of the laboratory is adjusted by the environmental temperature control unit, the water temperature of the water storage tank of the circulating water unit can be controlled by the cold and hot water unit and the cooling unit, and is supplied to the testing machine through the testing water pump. The environmental temperature is acquired by the temperature acquisition device and the three-way control valve is controlled. When it is not necessary to recover the heat of the water discharged from the testing machine, the first port and the third port of the three-way control valve are communicated, so that the water of the testing machine directly returns to the water storage tank. When it is necessary to recover the heat of the water discharged from the testing machine, the first port and the second port are controlled to be communicated, and the opening degree of the three-way control valve is controlled, so that part or all of the water of the testing machine flows into the return air disc and then flows back to the water storage tank, thereby using the water discharged from the testing machine to adjust the environmental temperature of the laboratory. The water temperature of the water discharged from the testing machine is fully utilized to reduce the energy consumption of the environmental temperature control unit; at the same time, the temperature of the laboratory can be ensured to be stable, and the testing work can be ensured to proceed smoothly. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0025] Figure 1 It is a schematic diagram of a heat pump energy-saving system for laboratories of the present utility model.

[0026] In the figure:

[0027] 1. Environmental temperature control unit; 11. Outdoor unit for cold and hot air working condition; 12. Indoor unit for cold and hot air working condition; 2. Circulating water unit; 21. Water storage tank; 22. Testing water pump; 3. Cold and hot water unit; 31. Unit water tank; 32. Working condition water pump; 4. Cooling unit; 41. Cooling tower; 42. Cooling water pump; 5. Anti-freezing component; 51. Air compressor; 52. Switch control valve; 53. Switch valve; 54. Temperature control switch; 6. Three-way control valve; 7. Testing machine; 8. Return air disc; 9. Heater. Detailed Embodiments

[0028] Before explaining any embodiments of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0029] In the present application, the terms "comprising", "including", "having" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0030] In the present application, the terms "connected", "joined", "coupled", "mounted" may be direct connection, joining, coupling or mounting, or may be indirect connection, joining, coupling or mounting. For example, direct connection means that two parts or components are connected together without an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and the two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.

[0031] In the present application, those of ordinary skill in the art will understand that the functions performed by a component may be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part may also be performed by one part, one component, or a combination of multiple parts.

[0032] In the present application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and position relationship shown in the drawings, and should not be construed as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side may include directly below, lower left, lower right, lower front, and lower rear, etc.

[0033] When a heat pump unit or a central air-conditioning unit is used as a test machine for testing in a laboratory, in order to reduce the energy consumption during the testing process and ensure the smooth progress of the testing work, such as Figure 1As shown in the figure, the utility model provides a heat pump energy-saving system for laboratories. The heat pump energy-saving system for laboratories includes an environmental temperature control unit 1, a circulating water unit 2, a cold and hot water unit 3, a cooling unit 4, a recovered air handling unit 8, and a temperature acquisition device.

[0034] Among them, the environmental temperature control unit 1 is used to adjust the temperature of the laboratory; the circulating water unit 2 includes a water storage tank 21 and a test water pump 22. The water storage tank 21 is communicated with the test water pump 22, and the test water pump 22 is communicated with the water inlet of a test machine 7 located in the laboratory. The cold and hot water unit 3 is communicated with the water storage tank 21 and is used to heat or cool the water in the water storage tank 21. The cooling unit 4 is communicated with the water storage tank 21 and is used to cool the water in the water storage tank 21. A three-way control valve 6 is arranged between the recovered air handling unit 8 and the test machine 7. The first port of the three-way control valve 6 is communicated with the water outlet of the test machine 7, the second port of the three-way control valve 6 is communicated with the water inlet of the recovered air handling unit 8, and the third port of the three-way control valve 6 is communicated with the water storage tank 21 and the water outlets of the recovered air handling unit 8. The temperature acquisition device is arranged in the laboratory and is electrically connected to the three-way control valve 6.

[0035] During the test, the environmental temperature of the laboratory is adjusted by the environmental temperature control unit 1. The water temperature of the water storage tank 21 of the circulating water unit 2 can be controlled by the cold and hot water unit 3 and the cooling unit 4, and the water temperature can be accurately adjusted quickly and supplied to the test machine 7 through the test water pump 22. The environmental temperature is acquired by the temperature acquisition device and the three-way control valve 6 is controlled. When the heat of the water discharged from the test machine 7 does not need to be recovered, the first port and the third port of the three-way control valve 6 are communicated, so that the water of the test machine 7 directly returns to the water storage tank 21. When the heat of the water discharged from the test machine 7 needs to be recovered, the first port and the second port are controlled to be communicated, and the opening degree of the three-way control valve 6 is controlled, so that part or all of the water of the test machine 7 flows into the recovered air handling unit 8 and then flows back to the water storage tank 21, thereby using the water discharged from the test machine 7 to adjust the environmental temperature of the laboratory. The water temperature of the water discharged from the test machine 7 is fully utilized to reduce the energy consumption of the environmental temperature control unit 1; at the same time, the temperature of the laboratory can be ensured to be stable, and the test work can be ensured to proceed smoothly.

[0036] Furthermore, the cooling unit 4 includes a cooling water pump 42 and a cooling tower 41 which are connected in sequence. Both the cooling water pump 42 and the cooling tower 41 are communicated with the water storage tank 21. When the water in the water storage tank 21 needs to be cooled, the cooling water pump 42 is started, and the water in the water storage tank 21 is circulated to the cooling tower 41 to exchange heat with the outside air, so as to dissipate heat, reduce the water temperature, and flow back to the water storage tank 21. The water temperature can be effectively reduced through several cycles.

[0037] Furthermore, the cold and hot water unit 3 includes a unit water tank 31 and a working condition water pump 32. The unit water tank 31 and the working condition water pump 32 are connected in series with the storage water tank 21. When it is necessary to cool or heat the water in the storage water tank 21, the working condition water pump 32 is turned on, and the water in the storage water tank 21 is circulated to the unit water tank 31 for heating or refrigeration, so as to adjust the water temperature, and then flows back to the storage water tank 21. Through several cycles, the water temperature can be effectively guaranteed to be at an appropriate temperature. Moreover, the cold and hot water unit 3 can cooperate with the cooling unit 4 to achieve precise control of the water temperature in the storage water tank 21.

[0038] Furthermore, a heater 9 is provided in the storage water tank 21. When it is necessary to finely adjust the water temperature, the heater 9 is turned on, which can quickly and precisely adjust the water temperature, so as to quickly meet the use requirements of the testing machine 7 and ensure the testing efficiency.

[0039] Furthermore, the environmental temperature control unit 1 includes a hot and cold air working condition outdoor unit 11 and a hot and cold air working condition indoor unit 12 that are connected to each other. The hot and cold air working condition indoor unit 12 is located in the laboratory. Through the environmental temperature control unit 1, the temperature of the laboratory can be controlled according to the actual testing needs, ensuring the smooth progress of the testing work.

[0040] Furthermore, the temperature acquisition device includes a temperature sensor. The temperature sensor real-time collects the temperature of the laboratory and controls the action of the three-way control valve 6 through a controller, and can select whether to recycle the outlet water temperature of the testing machine 7 according to the need, ensuring the flexibility of control.

[0041] Furthermore, the laboratory heat pump energy-saving system further includes an anti-freezing component 5. The anti-freezing component 5 is connected to the recovery air disc 8 and is used to drain the water in the recovery air disc 8. By setting the anti-freezing component 5, when the temperature in the laboratory is relatively low and the testing work is not carried out, the water in the recovery air disc 8 can be drained, thereby preventing the recovery air disc 8 from being frozen and cracked.

[0042] Furthermore, the anti-freezing component 5 includes an inflation component, a drainage component, and a switch valve 53. Both the inflation component and the drainage component are connected to the recovery air disc 8, and the switch valve 53 is arranged at the water outlet of the recovery air disc 8. When draining the water in the recovery air disc 8, it is necessary to close the switch valve 53 and open the inflation component and the drainage component. Under the action of gas pressure, the water in the recovery air disc 8 is drained through the drainage component. Using the inflation component can effectively ensure that the water in the recovery air disc 8 is effectively drained, and at the same time, the gas can be used to clean the pipeline of the recovery air disc 8 to prevent internal corrosion.

[0043] Further, the antifreeze component 5 further includes a temperature control switch 54. The temperature control switch 54 is disposed on the return air coil 8, and the temperature control switch 54 is electrically connected to the inflation component, the switch valve 53, and the drainage component. By providing the temperature control switch 54, when the test work is carried out normally, the temperature control switch 54 does not work. When the test work is ended and the temperature is lower than the set temperature, the temperature control switch 54 works to control the inflation component, the switch valve 53, and the drainage component to perform corresponding operations, so that the water in the return air coil 8 is effectively discharged. By adopting the above method, the automatic operation of low-temperature drainage can be realized, and the return air coil 8 can be effectively prevented from being frozen and cracked. Controlling by using the temperature control switch 54 is the prior art, and its working principle will not be elaborated here too much.

[0044] Further, the inflation component includes an air compressor 51. The air compressor 51 is communicated with the return air coil 8 through an inflation pipe, and the air compressor 51 is electrically connected to the temperature control switch 54. When the return air coil 8 drains water, the air compressor 51 works to blow high-pressure gas into the return air coil 8, so that the water in the return air coil 8 is discharged under the action of air pressure. And the high-pressure gas can dry the inner wall of the pipeline of the return air coil 8, so as to play a role in preventing the pipeline of the return air coil 8 from being corroded.

[0045] Further, the drainage component includes a drainage pipeline. A switch control valve 52 is disposed on the drainage pipeline. The drainage pipeline is communicated with the return air coil 8, and the switch control valve 52 is electrically connected to the temperature control switch 54. When the return air coil 8 drains water, the switch control valve 52 opens, so that the water is smoothly discharged through the drainage pipeline. When the test work is carried out, the switch control valve 52 can be normally closed.

[0046] The working process of this laboratory heat pump energy-saving system is as follows:

[0047] When the test machine 7 tests the heating condition, the laboratory ambient temperature condition is -12°C, the water outlet temperature of the test machine 7 is 41°C, and the heat of the water outlet of the test machine 7 is recovered to supply the laboratory ambient temperature. The test water pump 22 is started to transport the water in the water storage tank 21 to the test machine 7, and then through the three-way control valve 6, at this time, the first port enters and the second port exits, to the return air coil 8, and then back to the water storage tank 21 to recover the heat of the tested machine. When the target temperature of the laboratory < the actual temperature of the laboratory, the three-way control valve 6 enters from the first port and exits from the second port at this time, and the opening degree of the three-way control valve 6 is 100% for recovery; when the laboratory target temperature = the laboratory actual temperature, the three-way control valve 6 enters from the first port and exits from the second port at this time, and the opening degree of the three-way control valve 6 is 90% for recovery; when the laboratory target temperature exceeds the laboratory actual temperature by 1°C - 3°C, the three-way control valve 6 enters from the first port and exits from the second port at this time, and the opening degree of the three-way control valve 6 is 80% for recovery; when the laboratory target temperature exceeds the laboratory actual temperature by 4°C - 6°C, the three-way control valve 6 enters from the first port and exits from the second port at this time, and the opening degree of the three-way control valve 6 is 70% for recovery.

[0048] When the testing machine 7 tests the refrigeration working condition, the laboratory ambient temperature working condition is 35°C, the water outlet temperature is 7°C, and the cold quantity of the water outlet of the testing machine 7 is recovered to supply the laboratory ambient temperature. The testing water pump 22 is turned on to convey the water in the water storage tank 21 to the testing machine 7, and then through the three-way control valve 6, the first port enters and the second port exits at this time, to the recovery air handling unit 8, and then back to the water storage tank 21 to recover the cold quantity of the tested machine. At this time, the three-way control valve 6 is controlled such that when the laboratory target temperature < the laboratory actual temperature, the three-way control valve 6 has the first port entering and the second port exiting at this time, and the opening degree of the three-way control valve 6 is 100% for recovery; when the laboratory target temperature = the laboratory actual temperature, the three-way control valve 6 has the first port entering and the second port exiting at this time, and the opening degree of the three-way control valve 6 is 90% for recovery; when the laboratory target temperature is 1°C - 3°C higher than the laboratory actual temperature, the three-way control valve 6 has the first port entering and the second port exiting at this time, and the opening degree of the three-way control valve 6 is 80% for recovery; when the laboratory target temperature is 4°C - 6°C higher than the laboratory actual temperature, the three-way control valve 6 has the first port entering and the second port exiting at this time, and the opening degree of the three-way control valve 6 is 70% for recovery.

[0049] This heat pump energy-saving system for laboratory uses a temperature sensor to detect the laboratory, precisely adjusts the three-way control valve 6 according to the temperature, and controls the energy-saving recovery of cold and heat of the recovery air handling unit 8. And under low-temperature working conditions, by draining the water of the recovery air handling unit 8 in time, the safety of the recovery air handling unit 8 is protected, and the control is precise, energy-saving, safe and stable.

[0050] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Laboratory heat pump energy-saving system, characterized in that: include: An environmental temperature control unit (1), the environmental temperature control unit (1) is used to adjust the temperature of the laboratory; A circulating water unit (2), comprising a water storage tank (21) and a test water pump (22), wherein the water storage tank (21) is connected to the test water pump (22), and the test water pump (22) is connected to a water inlet of a test machine (7) located in the laboratory; A hot and cold water machine (3), the hot and cold water machine (3) being in communication with the water storage tank (21) and being used for heating or cooling the water in the water storage tank (21); A cooling unit (4), the cooling unit (4) being in communication with the water storage tank (21) and being used for cooling the water in the water storage tank (21); A recovery air disk (8), wherein a three-way control valve (6) is arranged between the recovery air disk (8) and the testing machine (7), wherein a first port of the three-way control valve (6) is connected to a water outlet of the testing machine (7), a second port of the three-way control valve (6) is connected to a water inlet of the recovery air disk (8), and a third port of the three-way control valve (6) is connected to the water storage tank (21) and the water outlet of the recovery air disk (8); A temperature collection device is arranged in the laboratory, and the temperature collection device is electrically connected to the three-way control valve (6).

2. The laboratory heat pump energy-saving system according to claim 1, characterized in that: The cooling unit (4) comprises a cooling water pump (42) and a cooling tower (41) which are connected in sequence, and the cooling water pump (42) and the cooling tower (41) are both connected to the water storage tank (21).

3. The laboratory heat pump energy-saving system according to claim 1, characterized in that: The hot and cold water unit (3) comprises a unit water tank (31) and a working water pump (32); the unit water tank (31), the working water pump (32) and the water storage tank (21) are connected in series.

4. The laboratory heat pump energy-saving system according to claim 1, characterized in that: The environmental temperature control unit (1) comprises a cold and hot air working condition outdoor unit (11) and a cold and hot air working condition indoor unit (12) which are interconnected, and the cold and hot air working condition indoor unit (12) is located in the laboratory.

5. The laboratory heat pump energy-saving system according to claim 1, characterized in that: It also includes an antifreeze component (5), which is connected to the recovery air disk (8) and is used to discharge water from the recovery air disk (8).

6. The laboratory heat pump energy-saving system according to claim 5, characterized in that: The antifreeze component (5) comprises an air filling component, a drainage component and a switch valve (53); the air filling component and the drainage component are both connected to the recovery air disk (8); and the switch valve (53) is arranged at the water outlet of the recovery air disk (8).

7. The heat pump energy-saving system for a laboratory according to claim 6, characterized in that: The antifreeze component (5) further comprises a temperature control switch (54), wherein the temperature control switch (54) is arranged on the recovery air disk (8), and the temperature control switch (54) is electrically connected to the inflation component, the switch valve (53) and the drainage component.

8. The laboratory heat pump energy-saving system according to claim 7, characterized in that: The inflation assembly comprises an air compressor (51), the air compressor (51) is connected to the recovery air disk (8) via an inflation pipe, and the air compressor (51) is electrically connected to the temperature control switch (54).

9. The laboratory heat pump energy-saving system according to claim 7, characterized in that: The drainage component comprises a drainage pipeline, on which a switch control valve (52) is arranged, the drainage pipeline is connected to the recovery air disk (8), and the switch control valve (52) is electrically connected to the temperature control switch (54).

10. The heat pump energy-saving system for a laboratory according to any one of claims 1 to 9, characterized in that: A heater (9) is arranged in the water storage tank (21).

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