A full-operating condition test system and working method for a chiller

Abstract

The present invention relates to a full-operating condition test system and working method of a chiller, the system comprising a test unit and a temperature regulating subsystem; the temperature regulating subsystem is used to perform heat exchange on a first condenser, or on a first evaporator and a first condenser, to meet the test requirements under different operating conditions; the heat exchange requirements of the test unit are met by switching the pipe connection mode between the first evaporator, the first condenser and the temperature regulating subsystem, and the pipe connection mode between the first evaporator and the first condenser, so as to realize full-operating condition testing of the chiller under normal operating conditions, reverse temperature difference operating conditions and summer high temperature operating conditions. The present invention changes the composition of the temperature regulating subsystem through flexible pipe switching, and can realize rapid switching of multiple test operating conditions, so that the system can simulate the test requirements under different conditions of normal operating conditions, reverse temperature difference operating conditions and summer high temperature operating conditions, reduce equipment redundancy, and improve the adaptability and operation convenience of the system.

Description

Technical Field

[0001] The invention relates to a full-operating-condition testing system and a working method for a chiller, and belongs to the technical field of chiller testing. Background Art

[0002] At present, many water-cooled chillers have the technical conditions for year-round refrigeration operation. In order to realize the simulation test of the unit under different operating conditions throughout the year, the water-cooled chiller test system needs to have the testing capabilities of conventional conditions, summer high temperature conditions, and inverse temperature difference conditions.

[0003] However, existing test systems have problems such as equipment redundancy and the difficulty of a single system to simultaneously possess the above test capabilities. For example, in existing reverse operating condition test systems, the operating condition unit needs to be equipped with a cooling tower for heat dissipation. When operating under normal operating conditions, the operating condition unit does not need to be turned on. The cooling tower is a redundant device, which increases the construction cost of the test system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a full-operating condition testing system for a chiller, which realizes simulation testing of different operating conditions throughout the year through flexible switching of pipelines, reduces equipment redundancy, and meets high-efficiency and energy-saving testing requirements.

[0005] At the same time, a working method of the full-operating condition test system of the above-mentioned chiller is also provided.

[0006] The technical solution of the present invention is:

[0007] In one aspect, the present invention provides a full-operating-condition test system for a chiller, comprising a test unit and a temperature regulating subsystem;

[0008] The test unit includes a first evaporator and a first condenser. The first evaporator is used as a user side, and the first condenser is used as a heat source. A first circulating pump is provided between the first evaporator water outlet pipe and the first evaporator water inlet pipe, and a second circulating pump is provided between the first condenser water outlet pipe and the first condenser water inlet pipe.

[0009] The temperature adjustment subsystem is used to perform heat exchange on the first condenser, or on the first evaporator and the first condenser, to meet the test requirements under different working conditions;

[0010] By switching the pipeline connection mode between the first evaporator, the first condenser and the temperature regulation subsystem, as well as the connection between the first evaporator and the first condenser, the heat exchange requirements of the test unit can be met, and the test unit can be tested under full operating conditions under conventional conditions, inverse temperature difference conditions and high temperature conditions in summer.

[0011] Preferably, according to the present invention, the temperature adjustment subsystem is used to cool the outlet water of the first condenser to meet the test requirements under normal working conditions;

[0012] The normal working condition is that the outlet water temperature of the first condenser in the test unit is higher than the inlet water temperature of the first evaporator;

[0013] The temperature regulating subsystem includes a first water tank and a cooling tower, a first water tank water inlet pipe and a first water tank water outlet pipe are arranged between the first water tank and the first condenser water outlet pipe, and a third circulating pump and a first valve are arranged on the first water tank water outlet pipe, the first water tank water inlet pipe includes a first water tank water inlet pipe I and a first water tank water inlet pipe II which are interconnected, and a second valve is arranged on the first water tank water inlet pipe II;

[0014] The cooling tower is provided with a first water inlet pipe of the cooling tower and a first water outlet pipe of the cooling tower, and the first water inlet pipe of the cooling tower, the cooling tower, the first water outlet pipe of the cooling tower and the first water tank water inlet pipe ‌II are connected in parallel; a third valve is provided on the first water inlet pipe of the cooling tower, and a fourth valve is provided on the first water outlet pipe of the cooling tower; the cooling tower can provide low-temperature water for the first water tank, take away the heat of the first condenser, and can meet the test requirements under normal temperature conditions. And the outlet water temperature of the cooling tower is lower than the inlet water temperature of the first condenser in the test unit. At this time, the test system can realize heat exchange between the first condenser and the first evaporator on both sides through a circulating pump.

[0015] Preferably, according to the present invention, the temperature adjustment subsystem is used to cool the outlet water of the first condenser to meet the test requirements under high temperature conditions in summer;

[0016] The high temperature condition in summer is that the outlet water temperature of the first condenser in the test unit is higher than the inlet water temperature of the first evaporator;

[0017] The temperature regulation subsystem also includes a working condition unit and a second water tank.

[0018] The working condition unit includes a second evaporator and a second condenser, and the second evaporator is used to cool the outlet water of the first condenser;

[0019] A first water tank water inlet pipe and a first water tank water outlet pipe are arranged between the first water tank and the first condenser water outlet pipe, and a third circulation pump and a first valve are arranged on the first water tank water outlet pipe, the first water tank water inlet pipe comprises a first water tank water inlet pipe I and a first water tank water inlet pipe II which are interconnected, and a second valve is arranged on the first water tank water inlet pipe II;

[0020] A second evaporator water inlet pipe and a second evaporator water outlet pipe are respectively arranged between the second evaporator and the first water tank; a fifth circulation pump is also arranged on the second evaporator water inlet pipe;

[0021] A second condenser water outlet pipe and a second condenser water inlet pipe are respectively arranged between the second condenser and the second water tank; a sixth circulation pump is also arranged on the second condenser water inlet pipe;

[0022] A second water inlet pipe of the cooling tower and a second water outlet pipe of the cooling tower are arranged between the second water tank and the cooling tower, a seventh circulation pump and a fifth valve are arranged in the second water inlet pipe of the cooling tower, and a sixth valve is arranged on the second water outlet pipe of the cooling tower;

[0023] And the outlet water temperature of the cooling tower is higher than the inlet water temperature of the first condenser in the test unit. The cooling tower cannot meet the heat dissipation demand of the first condenser of the heat source test.

[0024] Preferably according to the present invention, a hot water exchange pipe and a cold water exchange pipe are respectively provided between the first condenser water outlet pipe and the first evaporator water outlet pipe, and a fourth circulation pump is provided on the hot water exchange pipe.

[0025] Preferably, according to the present invention, the temperature regulating subsystem is used to cool the outlet water of the first condenser and heat the outlet water of the first evaporator to meet the test requirements under the inverse temperature difference condition;

[0026] The inverse temperature difference condition is that the outlet water temperature of the first condenser in the test unit is lower than the inlet water temperature of the first evaporator. At this time, the test system cannot achieve heat exchange of fluids on both sides through the circulating pump.

[0027] The temperature adjustment subsystem also includes a second water tank water inlet pipe and a second water tank water outlet pipe.

[0028] One end of the second water tank water inlet pipe and the second water tank water outlet pipe are both connected to the second water tank.

[0029] The other ends of the second water tank water inlet pipe and the second water tank water outlet pipe are connected to the first evaporator water outlet pipe, and the second water tank water outlet pipe is provided with an eighth circulation pump and a seventh valve, and the second water tank water inlet pipe is provided with an eighth valve;

[0030] In the temperature adjustment subsystem, the second condenser is used to heat the first evaporator, and the second evaporator is used to cool the first condenser to meet the test requirements under the inverse temperature difference condition;

[0031] In addition, the second water tank is placed indoors, and the cooling tower is placed outdoors, and the cooling tower is located more than 3 meters higher than the second water tank.

[0032] In one aspect, the present invention provides a working method of a multi-condition test system for a chiller, comprising:

[0033] Start the test unit, the first circulation pump and the second circulation pump;

[0034] When testing under normal working conditions, the cooling tower in the temperature regulation subsystem is connected to the first water tank, and the first water tank cools the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange;

[0035] When testing the high temperature working condition in summer, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange;

[0036] When the reverse temperature difference working condition is tested, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser and the second condenser is used to heat the outlet water of the first evaporator. At this time, there is no need to connect the pipe between the first evaporator and the first condenser for heat exchange.

[0037] Preferably, according to the present invention, when a test under normal working conditions is performed, the cooling tower in the temperature adjustment subsystem is connected to the first water tank, and the first water tank cools the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; specifically, the process includes:

[0038] Start the fourth circulation pump in the hot water exchange pipe, input the hot water in the water outlet pipe of the first condenser into the water outlet pipe of the first evaporator through the hot water exchange pipe, and input the cold water in the water outlet pipe of the first evaporator into the water outlet pipe of the first condenser through the cold water exchange pipe, so as to realize the heat exchange between the water outlet pipe of the first evaporator and the water outlet pipe of the first condenser;

[0039] Start the third circulation pump in the outlet pipe of the first water tank, open the first valve on the outlet pipe of the first water tank, the third valve in the first water inlet pipe of the cooling tower, and the fourth valve in the first water outlet pipe of the cooling tower, and close the working condition unit, the fifth circulation pump in the water inlet pipe of the second evaporator, the sixth circulation pump in the water inlet pipe of the second condenser, the seventh circulation pump in the second water inlet pipe of the cooling tower, the eighth circulation pump in the water outlet pipe of the second water tank, the second valve in the water inlet pipe of the first water tank, the fifth valve in the second water inlet pipe of the cooling tower, the sixth valve in the second water outlet pipe of the cooling tower, the seventh valve in the water outlet pipe of the second water tank, and the eighth valve in the water inlet pipe of the second water tank, so that the cooling tower is connected with the first water tank, and the first water tank cools the outlet water of the first condenser;

[0040] When the temperature of the first water tank is lower than the set value, the opening of the second valve in the water inlet pipe II of the first water tank and the third valve in the first water inlet pipe of the cooling tower are adjusted to meet the temperature requirement of the first water tank.

[0041] Preferably, according to the present invention, when a test is conducted under high temperature conditions in summer, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; specifically including:

[0042] Start the fourth circulation pump in the hot water exchange pipe, input the hot water in the water outlet pipe of the first condenser into the water outlet pipe of the first evaporator through the hot water exchange pipe, and input the cold water in the water outlet pipe of the first evaporator into the water outlet pipe of the first condenser through the cold water exchange pipe, so as to realize the heat exchange between the water outlet pipe of the first evaporator and the water outlet pipe of the first condenser;

[0043] Start the third circulation pump in the outlet pipe of the first water tank, the operating unit, the fifth circulation pump in the water inlet pipe of the second evaporator, the sixth circulation pump in the water inlet pipe of the second condenser, and the seventh circulation pump in the second water inlet pipe of the cooling tower; open the first valve in the outlet pipe of the first water tank, the second valve in the water inlet pipe of the first water tank, the fifth valve in the second water inlet pipe of the cooling tower, and the sixth valve in the second water outlet pipe of the cooling tower; close the eighth circulation pump in the outlet pipe of the second water tank, the third valve in the first water inlet pipe of the cooling tower, the fourth valve in the first water outlet pipe of the cooling tower, the seventh valve in the outlet pipe of the second water tank, and the eighth valve in the water inlet pipe of the second water tank; use the second evaporator in the operating unit to cool the outlet water of the first condenser.

[0044] Preferably, according to the present invention, when the inverse temperature difference working condition is tested, the outlet water of the first condenser is cooled by the second evaporator of the working condition unit in the temperature regulation subsystem and the outlet water of the first evaporator is heated by the second condenser; specifically, the process includes:

[0045] Start the working condition unit, the third circulating pump in the first water tank outlet pipe, the fifth circulating pump in the second evaporator inlet pipe, the sixth circulating pump in the second condenser inlet pipe, the seventh circulating pump in the second inlet pipe of the cooling tower, and the eighth circulating pump in the second water tank outlet pipe; open the first valve in the first water tank outlet pipe, the second valve in the first water tank inlet pipe II, the fifth valve in the second inlet pipe of the cooling tower, the sixth valve in the second outlet pipe of the cooling tower, the seventh valve in the second water tank outlet pipe, and the eighth valve in the second water tank inlet pipe;

[0046] Close the fourth circulation pump in the hot water pipe, the third valve in the first water inlet pipe of the cooling tower, and the fourth valve in the first water outlet pipe of the cooling tower;

[0047] The second evaporator of the operating unit is used to cool the outlet water of the first condenser, and the second condenser is used to heat the outlet water of the first evaporator.

[0048] Preferably according to the present invention, the working method also includes: after the test is completed, shutting down the test unit and the operating unit, shutting down the first circulation pump, the second circulation pump, the third circulation pump in the first water tank outlet pipe, the fifth circulation pump in the second evaporator inlet pipe, the sixth circulation pump in the second condenser inlet pipe, the seventh circulation pump in the second water inlet pipe of the cooling tower, the eighth circulation pump in the second water tank outlet pipe, and closing the first valve in the first water tank outlet pipe, the second valve in the first water tank inlet pipe ‌II, the fifth valve in the second water inlet pipe of the cooling tower, the seventh valve in the second water tank outlet pipe, and the eighth valve in the second water tank inlet pipe, and only opening the sixth valve in the second water outlet pipe of the cooling tower to allow the water in the cooling tower to flow back to the second water tank.

[0049] The beneficial effects of the present invention are:

[0050] 1. The present invention changes the composition of the temperature regulation subsystem through flexible pipeline switching, which can realize rapid switching of various test conditions, so that the system can simulate the test requirements under different conditions of conventional conditions, inverse temperature difference conditions and summer high temperature conditions, reduce equipment redundancy, and improve the adaptability and operational convenience of the system.

[0051] 2. Place the second water tank in the indoor test platform area, and place the cooling tower outdoors, more than 3 meters above the water tank. When the inverse temperature difference test system stops running, the water at the bottom of the cooling tower water pan flows back to the second water tank indoors, avoiding the freezing of the water in the cooling tower at low temperatures, saving the cost and energy consumption of electric heating of the cooling tower water pan.

[0052] 3. During the summer high temperature test, after the heat of the second condenser in the working condition unit is released to the second water tank, it is all released to the environment by the cooling tower, and does not participate in the water addition of the main circulation pipeline of the first evaporator in the test unit. This design can balance the cold and heat by adding water to the maximum extent between the use test and the heat source test, reduce part of the heat borne by the working condition unit, and reduce the energy consumption of the working condition unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic structural diagram of a full-operating condition test system for a chiller provided by the present invention.

[0054] Figure 2 The present invention provides a structural schematic diagram of a full-operating condition test system of a chiller when performing a conventional operating condition test.

[0055] Figure 3 The present invention provides a structural schematic diagram of a full-operating condition test system of a chiller when conducting a high-temperature operating condition test in summer.

[0056] Figure 4The present invention provides a structural schematic diagram of a full-operating condition test system of a chiller when performing an inverse temperature difference operating condition test.

[0057] In the figure, 1, the first condenser, 2, the first evaporator, 3, the second circulating pump, 4, the first circulating pump, 5, the first evaporator water inlet pipe, 6, the first evaporator water outlet pipe, 7, the first condenser water inlet pipe, 8, the first condenser water outlet pipe, 9, the first water tank, 10, the third circulating pump, 11, the first water tank water inlet pipe, 12, the first water tank water outlet pipe, 13, the second evaporator water inlet pipe, 14, the second evaporator water outlet pipe, 15, the second condenser, 16, the second evaporator, 17, the second condenser water outlet pipe, 18, the second condenser water inlet pipe, 19, the fifth circulating pump, 20, the sixth circulating pump, 2 1. The second water tank, 22. The hot water pipe, 23. The cold water pipe, 24. The cooling tower, 25. The first water outlet pipe of the cooling tower, 26. The second water outlet pipe of the cooling tower, 27. The second water inlet pipe of the cooling tower, 28. The first water inlet pipe of the cooling tower, 29. The fourth circulation pump, 30. The seventh circulation pump, 31. The second water tank outlet pipe, 32. The eighth circulation pump, 33. The second water tank inlet pipe, 34. The first valve, 35. The second valve, 36. The third valve, 37. The fourth valve, 38. The fifth valve, 39. The sixth valve, 40. The seventh valve, 41. The eighth valve, 42. The first water tank inlet pipe II. DETAILED DESCRIPTION

[0058] Several embodiments of the present application will be disclosed below with diagrams to clearly and completely describe the technical solution of the present invention. The drawings in the specification are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute improper limitations on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0059] In the present invention, unless otherwise clearly defined and specified, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0061] Example 1

[0062] This embodiment provides a full-operating condition test system for a chiller. Figure 1 As shown, it includes a test unit and a temperature regulation subsystem;

[0063] The test unit includes a first evaporator 2 and a first condenser 1. The first evaporator 2 is used as the user side, and the first condenser 1 is used as the heat source. A first circulating pump 4 is provided between the first evaporator water outlet pipe 6 and the first evaporator water inlet pipe 5, and a second circulating pump 3 is provided between the first condenser water outlet pipe 8 and the first condenser water inlet pipe 7.

[0064] The temperature adjustment subsystem is used to perform heat exchange on the first condenser 1, or on the first evaporator 2 and the first condenser 1, to meet the test requirements under different working conditions;

[0065] like Figure 2 , Figure 3 and Figure 4 As shown, by switching the pipe connection mode between the first evaporator 2, the first condenser 1 and the temperature regulation subsystem, and the connection between the first evaporator 2 and the first condenser 1, the heat exchange demand of the test unit is met, and the full-condition test of the test unit under normal conditions, inverse temperature difference conditions and summer high temperature conditions is achieved.

[0066] Example 2

[0067] This embodiment provides a full-operating-condition test system for a chiller, which differs from Embodiment 1 in that:

[0068] Tests for normal working conditions, such as Figure 2 As shown, the temperature adjustment subsystem is used to cool the outlet water of the first condenser 1 to meet the test requirements under normal working conditions;

[0069] The normal working condition is that the outlet water temperature of the first condenser 1 in the test unit is higher than the inlet water temperature of the first evaporator 2;

[0070] The temperature regulating subsystem includes a first water tank 9 and a cooling tower 24. A first water tank water inlet pipe 11 and a first water tank water outlet pipe 12 are arranged between the first water tank 9 and the first condenser water outlet pipe 8. A third circulating pump 10 and a first valve 34 are arranged on the first water tank water outlet pipe 12. The first water tank water inlet pipe includes a first water tank water inlet pipe I11 and a first water tank water inlet pipe II42 which are interconnected. A second valve 35 is arranged on the first water tank water inlet pipe II42.

[0071] The cooling tower 24 is provided with a first water inlet pipe 28 of the cooling tower and a first water outlet pipe 25 of the cooling tower, and the first water inlet pipe 28 of the cooling tower, the cooling tower 24, the first water outlet pipe 25 of the cooling tower are connected in parallel with the first water tank water inlet pipe ‌II42; a third valve 36 is provided on the first water inlet pipe 28 of the cooling tower, and a fourth valve 37 is provided on the first water outlet pipe 25 of the cooling tower. The cooling tower 24 can provide low-temperature water for the first water tank 9 and take away the heat of the first condenser 1, and can meet the test requirements under normal temperature conditions.

[0072] And the outlet water temperature of the cooling tower 24 is lower than the inlet water temperature of the first condenser 1 in the test unit. At this time, the test system can realize heat exchange between the first condenser 1 and the first evaporator 2 on both sides through a circulating pump;

[0073] In order to prevent the low-temperature water provided by the first water tank 9 from being too low in winter in cold regions and to meet the minimum flow requirement of the third circulating pump 10, this problem can be effectively avoided by setting the first water tank water inlet pipe ‌I11. By adjusting the opening of the second valve 35 in the first water tank water inlet pipe ‌II42 and the third valve 36 on the first water inlet pipe 28 of the cooling tower, the temperature of the water in the first water tank water outlet pipe 12 is adjusted to meet the heat dissipation requirement of the first condenser 1.

[0074] Example 3

[0075] This embodiment provides a full-operating-condition test system for a chiller, which differs from Embodiment 2 in that:

[0076] The full-operating condition test system also includes a hot water exchange pipe 22, a cold water exchange pipe 23 and a fourth circulation pump 29. A hot water exchange pipe 22 and a cold water exchange pipe 23 are respectively arranged between the first condenser outlet pipe 8 and the first evaporator outlet pipe 6, and a fourth circulation pump 29 is arranged on the hot water exchange pipe 22.

[0077] Under the action of the fourth circulation pump 29, the water in the first condenser water outlet pipe 8 enters the first evaporator water outlet pipe 6, the first circulation pump 4, the first evaporator water inlet pipe 5 through the hot water pipe 22 and the fourth circulation pump 29, and then enters the first evaporator 2 of the test unit, and then enters the first evaporator water outlet pipe 6, the cold water pipe 23, and finally enters the first condenser water outlet pipe 8.

[0078] Example 4

[0079] This embodiment provides a full-operating-condition test system for a chiller, which differs from Embodiment 1 in that:

[0080] Tests for high temperature conditions in summer, such as Figure 3 As shown, the temperature adjustment subsystem is used to cool the outlet water of the first condenser 1 to meet the test requirements under high temperature conditions in summer;

[0081] The high temperature working condition in summer is that the outlet water temperature of the first condenser 1 in the test unit is higher than the inlet water temperature of the first evaporator 2;

[0082] The temperature regulation subsystem includes a working condition unit, a second water tank 21, a cooling tower 24 and a first water tank 9.

[0083] The working condition unit includes a second evaporator 16 and a second condenser 15. The second evaporator 16 is used to cool the outlet water of the first condenser 1;

[0084] A first water tank water inlet pipe 11 and a first water tank water outlet pipe 12 are arranged between the first water tank 9 and the first condenser water outlet pipe 8, and a third circulating pump 10 and a first valve 34 are arranged on the first water tank water outlet pipe 12. The first water tank water inlet pipe includes a first water tank water inlet pipe I11 and a first water tank water inlet pipe II42 that are interconnected, and a second valve 35 is arranged on the first water tank water inlet pipe II42;

[0085] A second evaporator water inlet pipe 13 and a second evaporator water outlet pipe 14 are respectively arranged between the second evaporator 16 and the first water tank 9; a fifth circulation pump 19 is also arranged on the second evaporator water inlet pipe 13;

[0086] A second condenser water outlet pipe 17 and a second condenser water inlet pipe 18 are respectively arranged between the second condenser 15 and the second water tank 21; a sixth circulation pump 20 is also arranged on the second condenser water inlet pipe 18;

[0087] A second water inlet pipe 27 and a second water outlet pipe 26 of the cooling tower are provided between the second water tank 21 and the cooling tower 24 , a seventh circulation pump 30 and a fifth valve 38 are provided in the second water inlet pipe 27 of the cooling tower, and a sixth valve 39 is provided on the second water outlet pipe 26 of the cooling tower.

[0088] Furthermore, the outlet water temperature of the cooling tower 24 is higher than the inlet water temperature of the first condenser 1 in the test unit, and the heat dissipation requirement of the first condenser 1 of the heat source test unit cannot be met by the cooling tower 24 alone.

[0089] The second evaporator 16 of the operating unit is used to provide cooling water for the first water tank 9, thereby meeting the requirement for the water temperature in the first condenser water outlet pipe 8 under high temperature conditions in summer.

[0090] Example 5

[0091] This embodiment provides a full-operating-condition test system for a chiller, which differs from Embodiment 4 in that:

[0092] The full-operating condition test system also includes a hot water exchange pipe 22, a cold water exchange pipe 23 and a fourth circulation pump 29. A hot water exchange pipe 22 and a cold water exchange pipe 23 are respectively arranged between the first condenser outlet pipe 8 and the first evaporator outlet pipe 6, and a fourth circulation pump 29 is arranged on the hot water exchange pipe 22.

[0093] Example 6

[0094] This embodiment provides a full-operating-condition test system for a chiller, which differs from Embodiment 1 in that:

[0095] Tests for high temperature conditions with temperature inversion, such as Figure 3 As shown, the temperature regulation subsystem is used to cool the outlet water of the first condenser 1 and heat the outlet water of the first evaporator 2 to meet the test requirements under the inverse temperature difference condition;

[0096] The inverse temperature difference condition is that the outlet water temperature of the first condenser 1 in the test unit is lower than the inlet water temperature of the first evaporator 2. At this time, the test system cannot realize heat exchange of fluids on both sides through the circulating pump.

[0097] The temperature regulation subsystem includes a working condition unit, a second water tank 21, a cooling tower 24 and a first water tank 9.

[0098] The working condition unit includes a second evaporator 16 and a second condenser 15.

[0099] A first water tank water inlet pipe 11 and a first water tank water outlet pipe 12 are arranged between the first water tank 9 and the first condenser water outlet pipe 8, and a third circulating pump 10 and a first valve 34 are arranged on the first water tank water outlet pipe 12. The first water tank water inlet pipe includes a first water tank water inlet pipe I11 and a first water tank water inlet pipe II42 that are interconnected, and a second valve 35 is arranged on the first water tank water inlet pipe II42;

[0100] A second evaporator water inlet pipe 13 and a second evaporator water outlet pipe 14 are respectively arranged between the second evaporator 16 and the first water tank 9; a fifth circulation pump 19 is also arranged on the second evaporator water inlet pipe 13;

[0101] A second condenser water outlet pipe 17 and a second condenser water inlet pipe 18 are respectively arranged between the second condenser 15 and the second water tank 21; a sixth circulation pump 20 is also arranged on the second condenser water inlet pipe 18;

[0102] A second water inlet pipe 27 and a second water outlet pipe 26 of the cooling tower are provided between the second water tank 21 and the cooling tower 24, and a seventh circulation pump 30 and a fifth valve 38 are provided in the second water inlet pipe 27 of the cooling tower, and a sixth valve 39 is provided on the second water outlet pipe 26 of the cooling tower;

[0103] The temperature adjustment subsystem also includes a second water tank water inlet pipe 33 and a second water tank water outlet pipe 31.

[0104] One end of the second water tank water inlet pipe 33 and the second water tank water outlet pipe 31 are both connected to the second water tank 21.

[0105] The other ends of the second water tank water inlet pipe 33 and the second water tank water outlet pipe 31 are connected to the first evaporator water outlet pipe 6, and the second water tank water outlet pipe 31 is provided with an eighth circulation pump 32 and a seventh valve 40, and the second water tank water inlet pipe 33 is provided with an eighth valve 41;

[0106] In the temperature adjustment subsystem, the second condenser 15 is used to heat the first evaporator 2, and the second evaporator 16 is used to cool the first condenser 1, so as to meet the test requirements under the inverse temperature difference condition;

[0107] Furthermore, the second water tank 21 is placed indoors, and the cooling tower 24 is placed outdoors. The cooling tower 24 is located more than three meters higher than the second water tank 21 .

[0108] Example 7

[0109] This embodiment provides a working method of a multi-operating condition test system for a chiller, specifically, the working method of the test system provided in embodiment 1, combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 Provide a description, including:

[0110] Start the test unit, the first circulation pump 4 and the second circulation pump 3; open the valves in the first evaporator water outlet pipe 6, the first evaporator water inlet pipe 5, the first condenser water outlet pipe 8 and the first condenser water inlet pipe 7.

[0111] When testing under normal working conditions, the cooling tower 24 in the temperature adjustment subsystem is connected to the first water tank 9, and the first water tank 9 cools the outlet water of the first condenser 1; the first evaporator outlet pipe 6 is connected to the first condenser outlet pipe 8 for heat exchange;

[0112] When testing the high temperature working condition in summer, the second evaporator 16 of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser 1; the first evaporator outlet pipe 6 is connected to the first condenser outlet pipe 8 for heat exchange;

[0113] When the inverse temperature difference working condition is tested, the second evaporator 16 of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser 1, and the second condenser 15 is used to heat the outlet water of the first evaporator 2. At this time, there is no need to connect the pipe between the first evaporator 2 and the first condenser 1 for heat exchange.

[0114] Example 8

[0115] This embodiment provides a working method of a multi-condition test system for a chiller, specifically, Embodiment 3 provides a working method of a test system, combined with Figure 2 Provide a description, including:

[0116] When the test is performed under normal working conditions, the cooling tower 24 in the temperature adjustment subsystem is connected to the first water tank 9, and the first water tank 9 cools the outlet water of the first condenser 1. At the same time, the first evaporator outlet pipe 6 and the first condenser outlet pipe 8 are connected to exchange heat; specifically, the following steps are performed:

[0117] Start the fourth circulation pump 29 in the hot water exchange pipe 22, open the valves in the hot water exchange pipe 22 and the cold water exchange pipe 23, input the hot water in the first condenser water outlet pipe 8 into the water outlet pipe of the first evaporator 2 through the hot water exchange pipe 22, and input the cold water in the water outlet pipe of the first evaporator 2 into the water outlet pipe of the first condenser 1 through the cold water exchange pipe 23, so as to realize the heat exchange between the first evaporator water outlet pipe 6 and the first condenser water outlet pipe 8;

[0118] Start the third circulation pump 10 in the first water tank outlet pipe 12, open the first valve 34 on the first water tank outlet pipe 12, the third valve 36 in the first water inlet pipe 28 of the cooling tower, and the fourth valve 37 of the first water outlet pipe 25 of the cooling tower, close the working condition unit, the fifth circulation pump 19 and valve in the second evaporator inlet pipe 13, the sixth circulation pump 20 and valve in the second condenser inlet pipe 18, the seventh circulation pump 30 in the second water inlet pipe 27 of the cooling tower, the eighth circulation pump 32 in the second water tank outlet pipe 31, the second valve 35 in the first water tank inlet pipe ‌II42, the fifth valve 38 in the second water inlet pipe 27 of the cooling tower, the sixth valve 39 in the second water outlet pipe of the cooling tower, the seventh valve 40 in the second water tank outlet pipe 31, and the eighth valve 41 in the second water tank inlet pipe 33, so that the cooling tower 24 is connected with the first water tank 9, and the first water tank 9 cools the outlet water of the first condenser 1;

[0119] When the temperature of the first water tank 9 is lower than the set value, the second valve 35 in the first water tank inlet pipe II42 is opened and closed, and the opening of the second valve 35 in the first water tank inlet pipe II42 and the third valve 36 in the first water inlet pipe 28 of the cooling tower are adjusted to meet the temperature requirement of the first water tank 9.

[0120] Example 9

[0121] This embodiment provides a working method of a multi-condition test system for a chiller, specifically, Embodiment 5 provides a working method of a test system, combined with Figure 3 Provide a description, including:

[0122] When testing the high temperature working condition in summer, the second evaporator 16 of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser 1. At the same time, the first evaporator outlet pipe 6 and the first condenser outlet pipe 8 are connected to exchange heat; specifically, the following steps are performed:

[0123] Start the fourth circulation pump 29 in the hot water exchange pipe 22, open the valves in the hot water exchange pipe 22 and the cold water exchange pipe 23, input the hot water in the first condenser water outlet pipe 8 into the water outlet pipe of the first evaporator 2 through the hot water exchange pipe 22, and input the cold water in the water outlet pipe of the first evaporator 2 into the water outlet pipe of the first condenser 1 through the cold water exchange pipe 23, so as to realize the heat exchange between the first evaporator water outlet pipe 6 and the first condenser water outlet pipe 8;

[0124] Start the working condition unit, the third circulating pump 10 in the first water tank outlet pipe 12, the fifth circulating pump 19 and valve in the second evaporator inlet pipe 13, the sixth circulating pump 20 and valve in the second condenser inlet pipe 18, the seventh circulating pump 30 in the second water inlet pipe 27 of the cooling tower, open the second evaporator inlet pipe 13, the second evaporator outlet pipe 14, the second condenser outlet pipe 17, the valve in the second condenser inlet pipe 18, open the first valve 34 on the first water tank outlet pipe 12, the first water tank inlet pipe ‌I The second valve 35 on I42, the sixth valve 39 in the second water outlet pipe 26 of the cooling tower, and the fifth valve 38 in the second water inlet pipe 27 of the cooling tower; close the eighth circulation pump 32 in the second water tank outlet pipe 31, the third valve 36 in the first water inlet pipe 28 of the cooling tower, the fourth valve 37 in the first water outlet pipe 25 of the cooling tower, the seventh valve 40 in the second water tank outlet pipe 31, and the eighth valve 41 in the second water tank inlet pipe 33; use the second evaporator 16 in the working condition unit to cool the outlet water of the first condenser 1.

[0125] Example 10

[0126] This embodiment provides a working method of a multi-operating condition test system for a chiller, specifically, Embodiment 6 provides a working method of a test system, combined with Figure 4 Provide a description, including:

[0127] When the inverse temperature difference working condition is tested, the second evaporator 16 of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser 1 and the second condenser 15 is used to heat the outlet water of the first evaporator 2; specifically, it includes:

[0128] Start the working condition unit, the third circulating pump 10 in the first water tank outlet pipe 12, the fifth circulating pump 19 and valve in the second evaporator inlet pipe 13, the sixth circulating pump 20 and valve in the second condenser inlet pipe 18, the seventh circulating pump 30 in the second water inlet pipe 27 of the cooling tower, and the eighth circulating pump 32 in the second water tank outlet pipe 31, open the valves in the second evaporator inlet pipe 13, the second evaporator outlet pipe 14, the second condenser outlet pipe 17, and the second condenser inlet pipe 18, open the first valve 34 on the first water tank outlet pipe 12, the second valve 35 on the first water tank inlet pipe ‌II42, the sixth valve 39 in the second water outlet pipe 26 of the cooling tower, the fifth valve 38 in the second water inlet pipe 27 of the cooling tower, the seventh valve 40 in the second water tank outlet pipe 31, and the eighth valve 41 set on the second water tank inlet pipe 33;

[0129] Close the valve in the cold water pipe 23, the fourth circulation pump 29 and valve in the hot water pipe 22, the third valve 36 in the first water inlet pipe 28 of the cooling tower, and the fourth valve 37 in the first water outlet pipe 25 of the cooling tower;

[0130] The second evaporator 16 of the operating unit is used to cool the outlet water of the first condenser 1 , and the second condenser 15 is used to heat the outlet water of the first evaporator 2 .

[0131] Embodiment 11

[0132] This embodiment provides a working method of a multi-operating condition test system for a chiller, which differs from Embodiment 10 in that:

[0133] The working method also includes:

[0134] When the test is completed, shut down the test unit and the operating unit, shut down the first circulation pump 4, the second circulation pump 3, the third circulation pump 10, the fifth circulation pump 19, the sixth circulation pump 20, the seventh circulation pump 30, the eighth circulation pump 32, and the first valve 34, the second valve 35, the fifth valve 38, the seventh valve 40 and the eighth valve 41, and only open the sixth valve 39 in the second water outlet pipe 26 of the cooling tower, so that the water in the cooling tower 24 flows back to the second water tank 21.

[0135] Since the second water tank 21 is placed in the indoor test platform area, and the cooling tower 24 is placed outdoors, the cooling tower 24 is more than three meters higher than the second water tank 21. When the test system stops running, the water at the bottom of the water pan of the cooling tower 24 flows back to the indoor second water tank 21, which can avoid freezing of the water in the cooling tower 24 caused by low temperature, and also save the cost and energy consumption of setting up electric heating of the water pan of the cooling tower 24.

[0136] The above description shows and describes the preferred implementation of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other implementations, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the object concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A full-operating condition test system for a chiller, characterized in that: It includes a test unit and a temperature adjustment subsystem; the test unit includes a first evaporator and a first condenser, a first circulation pump is arranged between the first evaporator water outlet pipe and the first evaporator water inlet pipe, and a second circulation pump is arranged between the first condenser water outlet pipe and the first condenser water inlet pipe; the temperature adjustment subsystem is used to perform heat exchange on the first condenser, or on the first evaporator and the first condenser, to meet the test requirements under different working conditions; by switching the pipe connection mode between the first evaporator, the first condenser and the temperature adjustment subsystem, and the connection between the first evaporator and the first condenser to meet the heat exchange requirements of the test unit, the full working condition test of the test unit under normal working conditions, inverse temperature difference working conditions and high temperature working conditions in summer is realized; The temperature regulating subsystem is used to cool the outlet water of the first condenser to meet the test requirements under normal working conditions; the normal working condition is that the outlet water temperature of the first condenser in the test unit is higher than the inlet water temperature of the first evaporator; the temperature regulating subsystem includes a first water tank and a cooling tower, a first water tank inlet pipe and a first water tank outlet pipe are arranged between the first water tank and the outlet water pipe of the first condenser, and a third circulating pump and a first valve are arranged on the first water tank outlet pipe, the first water tank inlet pipe includes a first water tank inlet pipe I and a first water tank inlet pipe II which are interconnected, and a second valve is arranged on the first water tank inlet pipe II; a first cooling tower inlet pipe and a first cooling tower outlet pipe are arranged in the cooling tower, and the first cooling tower inlet pipe, the cooling tower, the first cooling tower outlet pipe and the first water tank inlet pipe II are connected in parallel; a third valve is arranged on the first cooling tower inlet pipe, and a fourth valve is arranged on the first cooling tower outlet pipe; and the outlet water temperature of the cooling tower is lower than the inlet water temperature of the first condenser in the test unit; The temperature regulating subsystem is used to cool the outlet water of the first condenser to meet the test requirements under high temperature conditions in summer; the high temperature conditions in summer are that the outlet water temperature of the first condenser in the test unit is higher than the inlet water temperature of the first evaporator; the temperature regulating subsystem also includes a working condition unit and a second water tank, the working condition unit includes a second evaporator and a second condenser, and the second evaporator is used to cool the outlet water of the first condenser; a first water tank inlet pipe and a first water tank outlet pipe are arranged between the first water tank and the first condenser outlet pipe, and a third circulating pump and a first valve are arranged on the first water tank outlet pipe, the first water tank inlet pipe includes a first water tank inlet pipe I and a first water tank inlet pipe II which are interconnected, and the first A second valve is provided on the water tank water inlet pipe II; a second evaporator water inlet pipe and a second evaporator water outlet pipe are respectively provided between the second evaporator and the first water tank; a fifth circulating pump is also provided on the second evaporator water inlet pipe; a second condenser water outlet pipe and a second condenser water inlet pipe are respectively provided between the second condenser and the second water tank; a sixth circulating pump is also provided on the second condenser water inlet pipe; a cooling tower second water inlet pipe and a cooling tower second water outlet pipe are provided between the second water tank and the cooling tower, and a seventh circulating pump and a fifth valve are provided in the second water inlet pipe of the cooling tower, and a sixth valve is provided on the second water outlet pipe of the cooling tower; and the outlet water temperature of the cooling tower is higher than the inlet water temperature of the first condenser in the test unit; The temperature regulation subsystem is used to cool the outlet water of the first condenser and heat the outlet water of the first evaporator to meet the test requirements under the inverse temperature difference condition; the inverse temperature difference condition is that the outlet water temperature of the first condenser in the test unit is lower than the inlet water temperature of the first evaporator; the temperature regulation subsystem also includes a second water tank inlet pipe and a second water tank outlet pipe, one end of the second water tank inlet pipe and the second water tank outlet pipe are both connected to the second water tank, the other ends of the second water tank inlet pipe and the second water tank outlet pipe are both connected to the first evaporator outlet pipe, and an eighth circulation pump and a seventh valve are provided on the second water tank outlet pipe, and an eighth valve is provided on the second water tank inlet pipe; in the temperature regulation subsystem, the second condenser is used to heat the first evaporator, and the second evaporator is used to cool the first condenser to meet the test requirements under the inverse temperature difference condition.

2. A full-operating condition test system for a chiller according to claim 1, characterized in that: A hot water exchange pipe and a cold water exchange pipe are respectively arranged between the first condenser water outlet pipe and the first evaporator water outlet pipe, and a fourth circulation pump is arranged on the hot water exchange pipe.

3. A working method of a multi-operating condition test system for a chiller according to any one of claims 1 to 2, characterized in that: include: Start the test unit, the first circulation pump and the second circulation pump; When testing under normal working conditions, the cooling tower in the temperature regulation subsystem is connected to the first water tank, and the first water tank cools the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; When testing the high temperature working condition in summer, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; When the inverse temperature difference working condition is tested, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser, and the second condenser is used to heat the outlet water of the first evaporator.

4. The working method according to claim 3, characterized in that: When the test is carried out under normal working conditions, the cooling tower in the temperature adjustment subsystem is connected to the first water tank, and the first water tank cools the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; specifically including: Start the fourth circulation pump in the hot water exchange pipe, input the water in the first condenser water outlet pipe into the first evaporator water outlet pipe through the hot water exchange pipe, input the water in the first evaporator water outlet pipe into the first condenser water outlet pipe through the cold water exchange pipe, so as to realize the heat exchange between the first evaporator water outlet pipe and the first condenser water outlet pipe; Start the third circulation pump in the outlet pipe of the first water tank, open the first valve on the outlet pipe of the first water tank, the third valve in the first water inlet pipe of the cooling tower, and the fourth valve in the first water outlet pipe of the cooling tower, and close the working condition unit, the fifth circulation pump in the water inlet pipe of the second evaporator, the sixth circulation pump in the water inlet pipe of the second condenser, the seventh circulation pump in the second water inlet pipe of the cooling tower, the eighth circulation pump in the water outlet pipe of the second water tank, the second valve in the water inlet pipe of the first water tank, the fifth valve in the second water inlet pipe of the cooling tower, the sixth valve in the second water outlet pipe of the cooling tower, the seventh valve in the water outlet pipe of the second water tank, and the eighth valve in the water inlet pipe of the second water tank, so that the cooling tower is connected with the first water tank, and the first water tank cools the outlet water of the first condenser; When the temperature of the first water tank is lower than the set value, the opening of the second valve in the water inlet pipe II of the first water tank and the third valve in the first water inlet pipe of the cooling tower are adjusted to meet the temperature requirement of the first water tank.

5. The working method according to claim 3, characterized in that: When testing the high temperature working condition in summer, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser; the outlet pipe of the first evaporator is connected to the outlet pipe of the first condenser for heat exchange; specifically including: Start the fourth circulation pump in the hot water exchange pipe, input the hot water in the water outlet pipe of the first condenser into the water outlet pipe of the first evaporator through the hot water exchange pipe, and input the cold water in the water outlet pipe of the first evaporator into the water outlet pipe of the first condenser through the cold water exchange pipe, so as to realize the heat exchange between the water outlet pipe of the first evaporator and the water outlet pipe of the first condenser; Start the third circulation pump in the outlet pipe of the first water tank, the operating unit, the fifth circulation pump in the water inlet pipe of the second evaporator, the sixth circulation pump in the water inlet pipe of the second condenser, and the seventh circulation pump in the second water inlet pipe of the cooling tower; open the first valve in the outlet pipe of the first water tank, the second valve in the water inlet pipe of the first water tank, the fifth valve in the second water inlet pipe of the cooling tower, and the sixth valve in the second water outlet pipe of the cooling tower; close the eighth circulation pump in the outlet pipe of the second water tank, the third valve in the first water inlet pipe of the cooling tower, the fourth valve in the first water outlet pipe of the cooling tower, the seventh valve in the outlet pipe of the second water tank, and the eighth valve in the water inlet pipe of the second water tank; use the second evaporator in the operating unit to cool the outlet water of the first condenser.

6. The working method according to claim 3, characterized in that: When the inverse temperature difference working condition is tested, the second evaporator of the working condition unit in the temperature regulation subsystem is used to cool the outlet water of the first condenser and the second condenser is used to heat the outlet water of the first evaporator; specifically, it includes: Start the working condition unit, the third circulating pump in the first water tank outlet pipe, the fifth circulating pump in the second evaporator inlet pipe, the sixth circulating pump in the second condenser inlet pipe, the seventh circulating pump in the second inlet pipe of the cooling tower, and the eighth circulating pump in the second water tank outlet pipe; open the first valve in the first water tank outlet pipe, the second valve in the first water tank inlet pipe II, the fifth valve in the second inlet pipe of the cooling tower, the sixth valve in the second outlet pipe of the cooling tower, the seventh valve in the second water tank outlet pipe, and the eighth valve in the second water tank inlet pipe; Close the fourth circulation pump in the hot water pipe, the third valve in the first water inlet pipe of the cooling tower, and the fourth valve in the first water outlet pipe of the cooling tower; The second evaporator of the operating unit is used to cool the outlet water of the first condenser, and the second condenser is used to heat the outlet water of the first evaporator.

7. The working method according to claim 6, characterized in that: The working method also includes: after the test is completed, shutting down the test unit and the operating unit, shutting down the first circulation pump, the second circulation pump, the third circulation pump in the first water tank outlet pipe, the fifth circulation pump in the second evaporator inlet pipe, the sixth circulation pump in the second condenser inlet pipe, the seventh circulation pump in the second water inlet pipe of the cooling tower, the eighth circulation pump in the second water tank outlet pipe, and closing the first valve in the first water tank outlet pipe, the second valve in the first water tank inlet pipe ‌II, the fifth valve in the second water inlet pipe of the cooling tower, the seventh valve in the second water tank outlet pipe, and the eighth valve in the second water tank inlet pipe, and only opening the sixth valve in the second water outlet pipe of the cooling tower to allow the water in the cooling tower to flow back to the second water tank.

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