Cold and heat quadruple supply system and control method thereof

Abstract

The invention discloses a cold and heat quadruple supply system and a control method thereof, belongs to the technical field of refrigerating and heating devices, and is designed for solving the problems that cold and heat demand time is not matched and the like. The cold and heat quadruple supply system comprises a first unit used for cooling and heating and comprising a cold and heat all-in-one machine; the second unit is used for supplying high-temperature hot water and comprises a high-temperature heat pump; and the third unit is used for supplying high-temperature steam and comprises a flash tank and a steam compressor. According to the cold and heat quadruple supply system and the control method thereof, cold water, heat supply, hot water and high-temperature steam can be prepared at the same time, the problem that cold and heat demand time is not matched is solved, and use is more convenient; and the operation state and the heat storage and cold storage conditions of the unit can be determined according to the cold quantity and the heat quantity actually required by a user, so that the operation energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration and heating devices, and in particular to a cooling and heating quadruple supply system and a control method thereof. Background Art

[0002] When using a heat pump, both cooling and heating may be used in the same system. Using different systems to meet the need for both cooling and heating requires a large initial investment in the system. Adding heat exchange devices on both sides of the heat pump evaporator and condenser allows the heat and cooling to be used simultaneously. Based on this, a multi-generation system is developed, in which the hot water on the first-stage heat pump condenser side is used to increase the temperature of the next-stage heat pump condenser, and the cooling generated on the first-stage heat pump evaporator side is used for cooling. However, due to the limitations of refrigerants and heat pump systems, it is difficult to achieve a large temperature rise, and the multi-generation system cannot cool and produce steam at the same time.

[0003] In some existing heat pump systems, a combination of air source heat pump and dual condenser water source heat pump is used. A buffer water tank is used between the two heat pumps to stabilize the heat pump working conditions, so that full-load cooling capacity can be provided while producing domestic hot water; or a hot water tank is connected to the water-cooled condenser side of the refrigeration heat pump composite system, and the drying cycle system and heating cycle system are used to meet the needs of refrigeration, high-temperature drying and heating; or the waste heat of the multi-split system is used to produce domestic hot water.

[0004] The defects of the above-mentioned existing heat pump system include: it cannot solve the problem of mismatch between cooling and heating demand time; moreover, the production temperature range of the heat pump combined supply system is limited, and the maximum production temperature is about 90°C, which cannot meet the production and use needs of high-temperature steam and high-temperature hot water. Summary of the invention

[0005] The purpose of the present invention is to propose a cooling and heating quadruple supply system and a control method thereof, which solves the problem of mismatching cooling and heating demand times and is more convenient to use.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] The combined cooling and heating system comprises: a first unit for cooling and heating, the first unit comprising a cooling and heating integrated machine; a second unit for supplying high-temperature hot water, the second unit comprising a high-temperature heat pump; and a third unit for supplying high-temperature steam, the third unit comprising a flash tank and a steam compressor.

[0008] In one of the preferred embodiments, the first unit also includes: a cold water storage tank, used to provide cold water for cold users, the cold water storage tank is connected to the cold and hot integrated machine through a cold water pipeline; and, a hot water storage tank, used to provide hot water for hot users and the second unit, the hot water outlet of the cold and hot integrated machine is connected to two hot water pipelines, one of which is connected to the hot water storage tank, and the other is connected to the second unit; the hot water outlet of the hot water storage tank is connected to two hot water pipelines, one of which is connected to the second unit, and the other is connected to the cold and hot integrated machine through a buffer water tank.

[0009] In one of the preferred embodiments, the second unit also includes a high-temperature water storage tank for supplying high-temperature hot water to high-temperature heat users, and the high-temperature heat pump includes two groups of water inlet and outlet combination ends, one group of second unit heat source water inlet and outlet pipes is connected to the first unit through a hot water pipe; the other group of high-temperature hot water inlet and outlet pipes is connected to two hot water pipes, one of which is a high-temperature hot water outlet pipe connected to the third unit, and the other is connected to the high-temperature hot water outlet pipe connected to the high-temperature water storage tank.

[0010] In one of the preferred embodiments, the third unit also includes a steam storage device for supplying high-temperature steam to steam heat users, the water inlet end of the flash tank is connected to the second unit through a water pipeline, the hot water inlet and outlet pipelines of the flash tank are connected to the second unit, and the flashed steam is connected to the steam compressor through a steam pipeline; the steam outlet of the steam compressor is connected to two steam outlet pipelines, one of which is connected to the steam storage device, and the other is connected to the steam heat user.

[0011] In one preferred embodiment, the flash tank includes a first flash tank and a second flash tank which are independent of each other, and the second unit also includes a high-temperature water storage tank for supplying high-temperature hot water to high-temperature heat users, the hot water outlet of the first flash tank is connected to the high-temperature heat pump through a pipeline, and the hot water hot port is connected to the high-temperature heat pump through a water pump and a pipeline; the hot water outlet of the second flash tank is connected to the high-temperature water storage tank through a pipeline, and the hot water inlet is connected to the high-temperature water storage tank through a water pump and a pipeline.

[0012] On the other hand, the present invention adopts the following technical solutions:

[0013] The control method of the combined cooling and heating system realizes the simultaneous production of cold water, heating, hot water and high-temperature steam by linking the integrated cooling and heating machine, high-temperature heat pump, flash tank and steam compressor.

[0014] In one of the preferred embodiments, when cooling is needed, when the water temperature in the cold storage water tank is ≥ an upper preset value, the integrated cold and hot machine is started, the hot water in the cold storage water tank is pumped into the integrated cold and hot machine, and the cold water in the integrated cold and hot machine is sent into the cold storage water tank; when the water temperature in the cold storage water tank is ≤ a lower preset value, the integrated cold and hot machine is turned off; when the water temperature in the cold storage water tank meets the required temperature, cold water is provided to cold users.

[0015] In one of the preferred embodiments, when hot water of 30°C-80°C is needed, when the water temperature in the water storage tank is ≤ a lower preset value, the integrated cold and hot machine is started, the cold water in the water storage tank is pumped into the integrated cold and hot machine, the cold water generated on the evaporator side of the integrated cold and hot machine is stored in the cold water storage tank, and the hot water in the integrated cold and hot machine is sent to the hot water storage tank; when the water temperature in the hot water storage tank is ≥ an upper preset value, the integrated cold and hot machine is turned off; when the water temperature in the hot water storage tank meets the required temperature, hot water is provided to heat users.

[0016] In one of the preferred embodiments, when high-temperature hot water of 80°C-150°C is needed, when the water temperature in the high-temperature water storage tank is ≤ the lower limit preset value, the hot water pipeline connecting the high-temperature heat pump to the third unit is shut off; if the water temperature in the water storage tank is ≥ the operating temperature of the evaporation side of the high-temperature heat pump, the hot water pipeline connecting the hot water outlet of the water storage tank to the buffer water tank is shut off, and the hot water in the water storage tank enters the high-temperature heat pump; if the water temperature in the water storage tank is ≤ the operating temperature of the evaporation side of the high-temperature heat pump, the integrated cold and hot machine is started, and the integrated cold and hot machine supplies hot water to the high-temperature heat pump; when the water temperature in the water storage tank is ≥ the upper limit preset value, the high-temperature heat pump is shut down; when the water temperature in the water storage tank meets the required temperature, high-temperature hot water is provided to high-temperature heat users.

[0017] In one of the preferred embodiments, when high-temperature steam needs to be produced, when the temperature in the steam storage device is ≤ the lower limit preset value, if the high-temperature water storage tank meets the flash evaporation demand, the steam compressor is started, the steam outlet of the second flash tank is connected to the steam compressor through a steam pipeline, and the steam outlet of the steam compressor is connected to the steam heat user; if the high-temperature water storage tank does not meet the flash evaporation temperature requirement, the high-temperature heat pump is started, the steam outlet of the first flash tank is connected to the steam compressor through a steam pipeline, and the steam outlet of the steam compressor is connected to the steam heat user.

[0018] The cold and hot quadruple supply system disclosed in the present invention includes a first unit for supplying cooling and heating, a second unit for supplying high-temperature hot water, and a third unit for supplying high-temperature steam, thereby realizing the simultaneous production of cold water, heating, hot water, and high-temperature steam. The operating state of the unit and the heat and cold storage conditions can be determined according to the actual amount of cooling and heat required by the user, so as to reduce operating energy consumption.

[0019] The control method of the cold and hot quadruple supply system disclosed in the present invention realizes the simultaneous production of cold water, heating, hot water and high-temperature steam by linking the cold and hot integrated machine, high-temperature heat pump, flash tank and steam compressor, thereby solving the problem of mismatch in the time of cold and hot demand and being more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a cooling and heating quadruple supply system provided in a specific embodiment of the present invention.

[0021] In the figure:

[0022] 1. Unit 1; 2. Unit 2; 3. Unit 3;

[0023] 101, integrated cold and hot machine; 102, cold water storage tank; 103, cold user; 104, hot water storage tank; 105, hot user; 106, buffer water tank; 107, first water pump; 108, second water pump; 109, third water pump; 110, fourth water pump; 111, fifth water pump; 112, first regulating water valve; 113, second regulating water valve; 114, third regulating water valve; 115, first temperature sensor; 116, second temperature sensor;

[0024] 201, high temperature heat pump; 202, high temperature water storage tank; 203, high temperature heat user; 204, sixth water pump; 205, seventh water pump; 206, eighth water pump; 207, fourth regulating water valve; 208, fifth regulating water valve; 209, sixth regulating water valve; 210, third temperature sensor;

[0025] 301. First flash tank; 302. Second flash tank; 303. Steam compressor; 304. Steam storage device; 305. Steam heat user; 306. Buffer water tank; 307. Seventh regulating water valve; 308. Eighth regulating water valve; 309. Ninth regulating water valve; 310. Tenth regulating water valve; 311. Eleventh regulating water valve; 312. Fourth temperature sensor. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, 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.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] This embodiment discloses a combined cooling and heating quadruple supply system and a control method thereof. Figure 1 As shown, the combined cooling and heating system includes a first unit 1 for cooling and heating, a second unit 2 for supplying high-temperature hot water, and a third unit 3 for supplying high-temperature steam, wherein the first unit 1 includes an integrated cooling and heating machine 101, the second unit 2 includes a high-temperature heat pump 201, and the third unit 3 includes a flash tank and a steam compressor 303.

[0033] The control method of the cold and hot quadruple supply system is as follows: by linking the cold and hot integrated machine 101, the high-temperature heat pump 201, the flash tank and the steam compressor 303, cold water, heating, hot water and high-temperature steam can be produced simultaneously, which solves the problem of mismatch between cold and hot demand time and is more convenient to use; the flash tank and the steam compressor 303 can produce high-temperature steam in coordination to meet the various needs of users and provide a good user experience; the first unit 1, the second unit 2 and the third unit 3 have their own supply temperature ranges, which expands the heating temperature range and has a wide range of applications.

[0034] During the operation of the cold and hot quadruple supply system, the operating state of the unit and the heat and cold storage conditions can be determined according to the actual cooling and heating requirements of the user to reduce the operating energy consumption. The production cost can be reduced when the requirements are different. When the local heating network is not stable enough, the hot water storage tank 104, the high-temperature hot water storage tank 202 and the steam storage device 304 can play a peak load role.

[0035] The specific structures of the first unit 1, the second unit 2 and the third unit 3 are not limited, as long as they can realize the simultaneous production of cold water, heating, hot water and high-temperature steam. In this embodiment, the first unit 1 also includes a cold water storage tank 102 for providing cold water to the cold user 103 and a hot water storage tank 104 for providing hot water to the hot user 105 and the second unit 2. The cold water storage tank 102 is provided with a first temperature sensor 115, and the hot water storage tank 104 is provided with a second temperature sensor 116. Among them, the cold water storage tank 102 is connected to the cold and hot integrated machine 101 through a cold water pipeline, and a first water pump 107 is provided on the cold water pipeline connected to the cold water outlet of the cold water storage tank 102. The hot water storage tank 104 is connected to the hot user 105 through a hot water pipeline, and a fourth water pump 110 is provided on the hot water pipeline connected between the hot water outlet of the hot water storage tank 104 and the inlet of the hot user 105.

[0036] Except for the cold water pipeline connected to the cold water storage tank 102, the hot water outlet of the cold and hot machine 101 is connected to two hot water pipelines, one of which is connected to the hot water storage tank 104 through the first regulating water valve 112, and the other is connected to the second unit 2 through the second regulating water valve 113; except for the water pipeline connected to the heat user 105, the hot water outlet end of the hot water storage tank 104 is connected to two hot water pipelines, one of which is connected to the second unit 2, and the other is connected to the cold and hot machine 101 through the third regulating water valve 114, the buffer water tank 106 and the third water pump 109.

[0037] The second unit 2 further includes a high temperature water storage tank 202 for supplying high temperature hot water to the high temperature heat user 203, and a third temperature sensor 210 is provided on the high temperature water storage tank 202. The high temperature heat user 203 and the high temperature water storage tank 202 are connected via a hot water pipeline, and a sixth water pump 204 is provided on the hot water pipeline connected to the hot water outlet of the high temperature water storage tank 202.

[0038] The high-temperature heat pump 201 includes two groups of water inlet and outlet combined ends, wherein a group of the second unit heat source water inlet and outlet pipes are connected to the first unit 1 through a hot water pipe. Specifically, the hot water inlet of the high-temperature heat pump 201 is connected to the cold and hot integrated machine 101 and the hot water storage tank 104 through a hot water pipe, and the hot water outlet of the high-temperature heat pump 201 is connected to the buffer water tank 106.

[0039] Another set of high-temperature hot water inlet and outlet pipes of the high-temperature heat pump 201 connects two hot water pipes, one of which is connected to the third unit 3 through the fifth regulating water valve 208, and the other is connected to the high-temperature water storage tank 202 through the fourth regulating water valve 207.

[0040] The third unit 3 also includes a steam storage device 304 for supplying high-temperature steam to the steam heat user 305 . A fourth temperature sensor 312 is provided on the steam storage device 304 . The outlet end of the steam storage device 304 is connected to the steam heat user 305 via an eleventh regulating water valve 311 .

[0041] The water inlet end of the flash tank is connected to the second unit 2 through a water pipeline, the hot water inlet and outlet pipelines of the flash tank are connected to the second unit 2, and the flashed steam is connected to the steam compressor 303 through a steam pipeline; the steam outlet of the steam compressor 303 is connected to two steam outlet pipelines, one of which is connected to the steam storage device 304 through the ninth regulating water valve 309, and the other steam outlet pipeline is connected to the steam heat user 305 through the tenth regulating water valve 310.

[0042] The specific number of flash tanks is not limited, and there can be only one to reduce costs. In this embodiment, the flash tank includes a first flash tank 301 and a second flash tank 302 that are independent of each other. The hot water outlet of the first flash tank 301 is connected to the high-temperature heat pump 201 through a pipeline, and the hot water hot port is connected to the high-temperature heat pump 201 through a water pump and a pipeline; the hot water outlet of the second flash tank 302 is connected to the high-temperature water storage tank 202 through a pipeline, and the hot water inlet is connected to the high-temperature water storage tank 202 through a water pump and a pipeline.

[0043] The cold water storage tank 102, the hot water storage tank 104, the high temperature hot water storage tank 202 and the steam storage device 304 are respectively cold and hot energy storage forms, which can meet the needs of energy saving and peak load regulation.

[0044] The specific structures of the integrated cooling and heating machine 101, the high-temperature heat pump 201, the flash tank, the steam compressor 303 and the temperature sensor are not limited, as long as they can achieve the corresponding functions. The three units cooperate with each other to control the start and stop of the integrated cooling and heating machine 101 and the high-temperature heat pump 201 according to the required cooling, heating and steam requirements to achieve the minimum energy consumption of the system.

[0045] The specific structures of the first regulating water valve 112, the second regulating water valve 113, the third regulating water valve 114, the fourth regulating water valve 207, the fifth regulating water valve 208, the sixth regulating water valve 209, the seventh regulating water valve 307, the eighth regulating water valve 308, the ninth regulating water valve 309, and the tenth regulating water valve 310 are not limited, as long as they can regulate the flow rate and on-off of the pipeline. In this embodiment, the valve body can be, but is not limited to, a solenoid valve and a three-way solenoid valve.

[0046] On the basis of the above structure, the cold and hot quadruple supply system further includes a control device. In this embodiment, the control device can be a centralized or distributed controller, for example, the controller can be a single microcontroller, or can be composed of multiple distributed microcontrollers, and the microcontroller can run a control program to control the cold and hot integrated machine 101, the high-temperature heat pump 201, the flash tank, and the steam compressor 303 to realize their functions.

[0047] The control method of the cold and hot quadruple supply system is as follows:

[0048] When cooling is required, the system operates in cooling mode, and the water temperature in the cold water tank 102 is maintained within the required temperature range of the cold user 103. The temperature sensor 115 arranged on the cold water tank 102 sends the detected temperature value to the control device, and the control device starts or shuts down the cold and hot machine 101 according to the temperature value. Specifically, when the water temperature in the cold water tank 102 is ≥ the upper limit preset value, the second water pump 108 and the cold and hot machine 101 are started, and the hot water in the cold water tank 102 is pumped into the cold and hot machine 101, and the cold water in the cold and hot machine 101 is sent into the cold water tank 102; when the water temperature in the cold water tank 102 is ≤ the lower limit preset value, the cold and hot machine 101 and the second water pump 108 are shut down; when the water temperature in the cold water tank 102 meets the required temperature, the first water pump 107 is turned on to provide cold water to the cold user 103.

[0049] At the same time, the heat on the heating side of the integrated cold and hot machine 101 can be stored in the hot water storage tank 104 or directly provide waste heat source to the high-temperature heat pump 201.

[0050] When hot water at 30°C-80°C is required, the system operates in the medium temperature water mode, and the water temperature in the hot water storage tank 104 is maintained within the temperature range required by the heat user 105. The second temperature sensor 116 arranged on the hot water storage tank 104 sends the detected temperature value to the control device, and the control device starts or shuts down the hot and cold integrated machine 101 according to the temperature value. Specifically, when the water temperature in the hot water storage tank 104 is ≤ the lower preset value, the first regulating water valve 112 is opened, the third regulating water valve 114 is opened, the second regulating water valve 113 is closed, the third water pump 109 is opened, the fifth water pump 111 is opened, and the second water pump 108 is opened at the same time, the hot and cold integrated machine 101 is started, the cold water generated on the evaporator side of the hot and cold integrated machine 101 is stored in the cold water storage tank 102, the cold water in the hot water storage tank 104 is pumped into the hot and cold integrated machine 101, the cold water generated on the evaporator side of the hot and cold integrated machine 101 is stored in the cold water storage tank 102, and the hot water in the hot and cold integrated machine 101 is sent to the hot water storage tank 104; when the water temperature in the hot water storage tank 104 is ≥ the upper preset value, the hot and cold integrated machine 101 is closed, the third water pump 109 is closed, and the first regulating water valve 112 is closed; when the water temperature in the hot water storage tank 104 meets the required temperature, the fourth water pump 110 is opened to provide hot water to the heat user 105.

[0051] If the cooling mode and the medium-temperature water mode are running at the same time, and any mode requires the integrated cooling and heating machine 101 to be in working state, the integrated cooling and heating machine 101 is started.

[0052] When high temperature hot water of 80°C-150°C is needed (under high pressure, the temperature of the high temperature hot water can exceed 100°C), the system operates in the high temperature water mode, and the water temperature in the high temperature water storage tank 202 is maintained within the temperature range required by the high temperature heat user 203. The third temperature sensor 210 disposed on the high temperature water storage tank 202 sends the detected temperature value to the control device, and the control device controls the start or shut down of the high temperature heat pump 201 according to the temperature value. Specifically, when the water temperature in the high-temperature water storage tank 202 is ≤ the lower limit preset value, the sixth regulating water valve 209 is opened, the fourth regulating water valve 207 is opened, the fifth regulating water valve 208 is closed, the eighth water pump 206 is opened, and the hot water pipeline connecting the high-temperature heat pump 201 to the third unit 3 is shut off; if the water temperature in the water storage tank 104 is ≥ the operating temperature of the evaporation side of the high-temperature heat pump 201, the third regulating water valve 114 is closed, the second regulating water valve 113 is closed, the first regulating water valve 112 is opened, the fifth water pump 111 is opened, the third water pump 109 is opened, the hot water pipeline connecting the hot water outlet of the water storage tank 104 to the buffer water tank 106 is shut off, and the hot water in the water storage tank 104 is ≥ the operating temperature of the evaporation side of the high-temperature heat pump 201. Water enters the high-temperature heat pump 201; if the water temperature in the hot water storage tank 104 is ≤ the operating temperature of the evaporation side of the high-temperature heat pump 201, close the third regulating water valve 114, open the second regulating water valve 113, close the first regulating water valve 112, close the fifth water pump 111, open the third water pump 109, start the hot and cold all-in-one machine 101, and the hot and cold all-in-one machine 101 delivers hot water to the high-temperature heat pump 201; when the water temperature in the hot water storage tank 202 is ≥ the upper limit preset value, turn off the high-temperature heat pump 201 and turn off the eighth water pump 206; when the water temperature in the hot water storage tank 202 meets the required temperature of the high-temperature heat user 203, turn on the sixth water pump 204 to provide high-temperature hot water to the high-temperature heat user 203.

[0053] When the first unit 1 and the second unit 2 are running at the same time, the hot water tank 104 needs to meet the needs of the heat user 105 and needs to meet the start-up requirements of the high-temperature heat pump 201, open the first regulating water valve 112, close the third regulating water valve 114, close the second regulating water valve 113, start the third water pump 109, start the fifth water pump 111, start the fourth water pump 110, and start the hot and cold integrated machine 101.

[0054] When high-temperature steam needs to be produced, the system operates in the steam mode, and the temperature in the steam storage device 304 is maintained within the temperature range required by the steam heat user 305. The fourth temperature sensor 312 provided on the steam storage device 304 sends the temperature value in the steam storage device 304 to the control device, and the control device starts or shuts down the steam compressor 303 according to the temperature value. Specifically, when the temperature in the steam storage device 304 is ≤ the lower limit preset value, if the high-temperature water storage tank 202 meets the flash demand, the eighth regulating water valve 308 is opened, the seventh water pump 205 is opened, the eleventh regulating water valve 311 is closed, the seventh regulating water valve 307 is closed, the ninth regulating water valve 309 is closed, the tenth regulating water valve 310 is opened, the steam compressor 303 is started, and the steam outlet of the second flash tank 302 is connected to the steam compressor 303 through the steam pipeline, and the steam outlet of the steam compressor 303 is connected to the steam heat user 305; if the high-temperature water storage tank 202 meets the flash demand, the eighth regulating water valve 308 is opened, the seventh water pump 205 is opened, the eleventh regulating water valve 311 is closed, the seventh regulating water valve 307 is closed, the ninth regulating water valve 309 is closed, the tenth regulating water valve 310 is opened, and the steam compressor 303 is started. The steam outlet of the second flash tank 302 is connected to the steam compressor 303 through the steam pipeline, and the steam outlet of the steam compressor 303 is connected to the steam heat user 305; if the high-temperature water storage tank 202 If the flash temperature requirement is not met, close the sixth regulating water valve 209, close the fourth regulating water valve 207, open the fifth regulating water valve 208, open the eighth water pump 206, start the high-temperature heat pump 201, open the seventh regulating water valve 307, close the eighth regulating water valve 308, close the ninth regulating water valve 309, close the eleventh regulating water valve 311, open the steam compressor 303, open the tenth regulating water valve 310, and connect the steam outlet of the first flash tank 301 to the steam compressor 303 through a steam pipeline, and connect the steam outlet of the steam compressor 303 to the steam heat user 305.

[0055] The cold water storage tank 102, the hot water storage tank 104, the high temperature hot water storage tank 202 and the steam storage device 304 all have temperature boundary ranges. When the actual temperature exceeds the boundary temperature, the heat / cold in the heat / cold storage device needs to be released by other means.

[0056] In summary, the heat demand of the cold and hot quadruple supply system is finally stored in the hot water storage tank 104, the high-temperature hot water storage tank 202 and the steam storage device 304, and the storage location is related to the temperature level required by the system. Specifically, when the maximum required temperature is 30℃-80℃, the heat storage location is the hot water storage tank 104; when the maximum required temperature is 80℃-150℃ high-temperature hot water, the heat is stored in the high-temperature hot water storage tank 202; when high-temperature steam is required, the heat is stored in the steam storage device 304.

[0057] In the control method of the cold and hot quadruple supply system, the judgment conditions for whether the cold and hot integrated machine 101 and the high-temperature heat pump 201 are started are as follows: whether the hot water in the hot water storage tank 104 meets the heat demand and temperature demand of the heat user 105, to determine whether to start the cold and hot integrated machine 101; whether the hot water in the high-temperature hot water storage tank 202 meets the heat demand and temperature demand of the high-temperature heat user 203, to determine whether to start the high-temperature heat pump 201 and the cold and hot integrated machine 101; whether the hot water in the high-temperature hot water storage tank 202 meets the flash condition of the second flash tank 302 and whether it meets the steam usage of the steam heat user 305, to determine whether to start the high-temperature heat pump 201. Moreover, any mode requires the cold and hot integrated machine 101 to be in working state, so the cold and hot integrated machine 101 needs to be started.

[0058] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A combined cooling and heating system, characterized in that: include: A first unit (1) is used for cooling and heating, wherein the first unit (1) comprises a cooling and heating integrated machine (101); A second unit (2) for supplying high-temperature hot water, wherein the second unit (2) comprises a high-temperature heat pump (201); and The third unit (3) is used to supply high-temperature steam, and the third unit (3) includes a flash tank and a steam compressor (303).

2. The cooling and heating quadruple supply system according to claim 1, characterized in that: The first unit (1) further comprises: A cold water storage tank (102) is used to provide cold water for cold users (103), the cold water storage tank (102) being connected to the cold and hot integrated machine (101) via a cold water pipeline; and The hot water storage tank (104) is used to provide hot water for the heat user (105) and the second unit (2); the hot water outlet of the hot and cold integrated machine (101) is connected to two hot water pipelines, one of which is connected to the hot water storage tank (104) and the other is connected to the second unit (2); the hot water outlet of the hot water storage tank (104) is connected to two hot water pipelines, one of which is connected to the second unit (2) and the other is connected to the hot and cold integrated machine (101) through a buffer water tank (106).

3. The cooling and heating quadruple supply system according to claim 1, characterized in that: The second unit (2) also includes a high-temperature water storage tank (202) for supplying high-temperature hot water to a high-temperature heat user (203); the high-temperature heat pump (201) includes two groups of water inlet and outlet combination ends, one group of second unit heat source water inlet and outlet pipelines is connected to the first unit (1) via a hot water pipeline; the other group of high-temperature hot water inlet and outlet pipelines is connected to two hot water pipelines, one of which is a high-temperature hot water outlet pipeline connected to the third unit (3), and the other is a high-temperature hot water outlet pipeline connected to the high-temperature water storage tank (202).

4. The cooling and heating quadruple supply system according to claim 1, characterized in that: The third unit (3) further comprises a steam storage device (304) for supplying high-temperature steam to a steam heat user (305); the water inlet end of the flash tank is connected to the second unit (2) via a water pipeline; the hot water inlet and outlet pipelines of the flash tank are connected to the second unit (2); the flashed steam is connected to the steam compressor (303) via a steam pipeline; the steam outlet of the steam compressor (303) is connected to two steam outlet pipelines, one of which is connected to the steam storage device (304) and the other is connected to the steam heat user (305).

5. The cooling and heating quadruple supply system according to claim 4, characterized in that: The flash tank comprises a first flash tank (301) and a second flash tank (302) which are independent of each other. The second unit (2) further comprises a high-temperature water storage tank (202) for supplying high-temperature hot water to a high-temperature heat user (203). The hot water outlet of the first flash tank (301) is connected to the high-temperature heat pump (201) via a pipeline, and the hot water hot port is connected to the high-temperature heat pump (201) via a water pump and a pipeline; the hot water outlet of the second flash tank (302) is connected to the high-temperature water storage tank (202) via a pipeline, and the hot water inlet is connected to the high-temperature water storage tank (202) via a water pump and a pipeline.

6. A control method for a cold and hot quadruple supply system, characterized in that: By linking the cold and hot integrated machine (101), the high-temperature heat pump (201), the flash tank and the steam compressor (303), it is possible to simultaneously produce cold water, heating, hot water and high-temperature steam.

7. The control method of the cooling and heating quadruple supply system according to claim 6, characterized in that: When cooling is required, when the water temperature in the cold storage water tank (102) is ≥ an upper preset value, the cold and hot integrated machine (101) is started, the hot water in the cold storage water tank (102) is pumped into the cold and hot integrated machine (101), and the cold water in the cold and hot integrated machine (101) is sent into the cold storage water tank (102); when the water temperature in the cold storage water tank (102) is ≤ a lower preset value, the cold and hot integrated machine (101) is turned off; When the water temperature in the cold storage water tank (102) meets the required temperature, cold water is provided to cold users (103).

8. The control method of the cooling and heating quadruple supply system according to claim 6, characterized in that: When hot water at 30°C-80°C is required, when the water temperature in the hot water storage tank (104) is ≤ a lower preset value, the integrated cold and hot machine (101) is started, the cold water in the hot water storage tank (104) is pumped into the integrated cold and hot machine (101), the cold water generated on the evaporator side of the integrated cold and hot machine (101) is stored in the cold water storage tank (102), and the hot water in the integrated cold and hot machine (101) is sent into the hot water storage tank (104); when the water temperature in the hot water storage tank (104) is ≥ an upper preset value, the integrated cold and hot machine (101) is turned off; When the water temperature in the hot water storage tank (104) meets the required temperature, hot water is provided to the heat user (105).

9. The control method of the cooling and heating quadruple supply system according to claim 6, characterized in that: When high-temperature hot water of 80°C-150°C is needed, when the water temperature in the high-temperature water storage tank (202) is ≤ the lower preset value, the hot water pipeline connecting the high-temperature heat pump (201) to the third unit (3) is shut off; if the water temperature in the water storage tank (104) is ≥ the operating temperature of the evaporation side of the high-temperature heat pump (201), the hot water pipeline connecting the hot water outlet of the water storage tank (104) to the buffer water tank (106) is shut off, and the hot water in the water storage tank (104) enters the high-temperature heat pump (201); if the water temperature in the water storage tank (104) is ≤ the operating temperature of the evaporation side of the high-temperature heat pump (201), the integrated cold and hot machine (101) is started, and the integrated cold and hot machine (101) delivers hot water to the high-temperature heat pump (201); when the water temperature in the water storage tank (202) is ≥ the upper preset value, the high-temperature heat pump (201) is shut off; When the water temperature in the heat storage tank (202) meets the required temperature, high-temperature hot water is provided to the high-temperature heat user (203).

10. The control method of the cooling and heating quadruple supply system according to claim 6, characterized in that: When high-temperature steam needs to be produced, when the temperature in the steam storage device (304) is less than or equal to a lower preset value, if the high-temperature water storage tank (202) meets the flash evaporation requirement, the steam compressor (303) is started, the steam outlet of the second flash tank (302) is connected to the steam compressor (303) through a steam pipeline, and the steam outlet of the steam compressor (303) is connected to a steam heat user (305); if the high-temperature water storage tank (202) does not meet the flash evaporation temperature requirement, the high-temperature heat pump (201) is started, the steam outlet of the first flash tank (301) is connected to the steam compressor (303) through a steam pipeline, and the steam outlet of the steam compressor (303) is connected to a steam heat user (305).

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