Air conditioner heat pump system and air conditioner heat pump unit

Abstract

The utility model relates to the technical field of air-conditioning systems, and discloses an air-conditioning heat pump system and an air-conditioning heat pump unit. The air conditioner heat pump system comprises a first heat exchanger used for preparing cold water or hot water, an anti-freezing water tank and a water pump. The first heat exchanger comprises a first channel and a second channel; the first channel is used for water circulation, and the second channel is used for refrigerant circulation. A water inlet of the anti-freezing water tank is communicated with a water outlet of the first channel, and a water outlet of the anti-freezing water tank is communicated with a water inlet of the first channel to form an anti-freezing circulation loop; the water pump is arranged between the anti-freezing water tank and the first channel and used for pumping water flow in the anti-freezing water tank into the first channel. According to the air conditioner heat pump system, water flow in the anti-freezing water tank can be pumped into the first channel by starting the water pump, so that the first heat exchanger can be prevented from being frozen, the anti-freezing reliability of the system is improved, and the problem that a plate heat exchanger of an air conditioner heat pump system taking water as a medium in the prior art is possibly frozen is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning system technical field especially relates to a kind of air conditioning heat pump system and air conditioning heat pump unit. BACKGROUND

[0002] Air-source air conditioning heat pump unit gradually becomes research hotspot.Currently, water is widely used in the market to bear heat load after heat exchange in plate heat exchanger, and the air conditioning heat pump heat exchange system with water as medium will exist when entering winter, water is not timely supplemented into the system, at this time, the unit enters antifreeze protection control logic, resulting in water pump dry burning and damage;If the water pump is protected at this time, the plate heat exchanger may be frozen and damaged, resulting in more economic losses.

[0003] Therefore, how to prevent the air conditioning heat pump system from being frozen and damaged is an urgent problem in the industry. INVENTION CONTENTS

[0004] The utility model provides a kind of air conditioning heat pump system and air conditioning heat pump unit, to solve the problem that the plate heat exchanger of air conditioning heat pump system with water as medium in prior art can be frozen and damaged.

[0005] The utility model provides a kind of air conditioning heat pump system, comprising:

[0006] First heat exchanger for making cold water or hot water, the first heat exchanger includes first channel and second channel;The first channel is used for water flow, and the second channel is used for refrigerant flow;

[0007] Anti-freezing water tank, the water inlet of the anti-freezing water tank is communicated with the water outlet of the first channel, and the water outlet of the anti-freezing water tank is communicated with the water inlet of the first channel, to form antifreeze circulating loop;

[0008] Water pump, set between the anti-freezing water tank and the first channel, for pumping water in the anti-freezing water tank into the first channel.

[0009] According to the air conditioning heat pump system provided by the utility model, further comprising:

[0010] Water load, two interfaces of the water load are communicated with the water inlet and the water outlet of the first channel respectively, to form main circulating loop;

[0011] First anti-freezing pipe, the water outlet of the anti-freezing water tank is connected to one side of the main circulating loop through the first anti-freezing pipe;

[0012] Second anti-freezing pipe, the water inlet of the anti-freezing water tank is connected to the other side of the main circulating loop through the second anti-freezing pipe;

[0013] A first valve body assembly, a water inlet of the first valve body assembly is communicated with the first anti-freezing pipe, a first water outlet of the first valve body assembly is communicated with a water inlet of the first channel, and a second water outlet of the first valve body assembly is communicated with one interface of the water-using load.

[0014] A second valve body assembly, a water inlet of the second valve body assembly is communicated with a water outlet of the first channel, a first water outlet of the second valve body assembly is communicated with a water inlet of the anti-freezing water tank, and a second water outlet of the second valve body assembly is communicated with another interface of the water-using load.

[0015] The air-conditioning heat pump system also comprises:

[0016] A heating assembly is arranged in the anti-freezing water tank and used for heating water in the anti-freezing water tank.

[0017] The air-conditioning heat pump system, the water pump is arranged in the main circulation loop, the water inlet of the first channel is communicated with the water outlet of the anti-freezing water tank through the water pump, or the water outlet of the second channel is communicated with the water inlet of the anti-freezing water tank through the water pump.

[0018] The air-conditioning heat pump system, the first valve body assembly comprises a first switch valve and a second switch valve, and the second valve body assembly comprises a third switch valve and a fourth switch valve.

[0019] The air-conditioning heat pump system also comprises:

[0020] A control assembly is electrically connected with the water pump, the first valve body assembly and the second valve body assembly.

[0021] The air-conditioning heat pump system, the water-using load comprises a fan coil or a radiator.

[0022] The air-conditioning heat pump system, a side surface of the anti-freezing water tank is provided with a sight glass.

[0023] The air-conditioning heat pump system, the first heat exchanger is a plate heat exchanger.

[0024] The air-conditioning heat pump system, the air-conditioning heat pump system comprises the air-conditioning heat pump system.

[0025] The air conditioner heat pump system provided by the utility model, through setting up anti-freezing water tank and water pump, in the case that the water quantity in the system is less than the minimum water quantity required by the first heat exchanger to circulate, or in the case that there is no water in the system, the water pump can be started to pump the water in the anti-freezing water tank into the first channel, so that the first heat exchanger can be prevented from being frozen and damaged, the reliability of the system anti-freezing is improved, and the problem that the plate heat exchanger in the air conditioner heat pump system using water as a medium can be frozen and damaged in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0027] Figure 1 It is the structural schematic diagram of the heat pump air conditioner unit provided by the utility model.

[0028] Reference signs:

[0029] 110, first heat exchanger, 120, shell, 111, first channel, 112, second channel,

[0030] 200, anti-freezing water tank,

[0031] 300, water pump,

[0032] 400, water load,

[0033] 510, first anti-freezing pipe, 520, second anti-freezing pipe,

[0034] 600, first valve body assembly, 610, first on-off valve, 620, second on-off valve,

[0035] 700, second valve body assembly, 710, third on-off valve, 720, fourth on-off valve,

[0036] 800, main circulating pipe, 810, first communication pipe, 820, second communication pipe,

[0037] 900, buffer water tank. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0039] In the description of the embodiments of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For the person skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0041] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be 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, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, a person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0043] The current air conditioning heat pump unit includes: air conditioning outdoor unit, water pump, buffer tank, expansion tank, target flow switch and distribution water heater and other auxiliary equipment; the air conditioning outdoor unit is located outdoors, and the air conditioning outdoor unit includes a compressor, a plate heat exchanger, an evaporator, an expansion valve and a four-way valve. The compressor, the second channel of the plate heat exchanger, the evaporator, the expansion valve and the four-way valve form a refrigerant circulation loop. The first channel of the plate heat exchanger forms a water circulation loop with the indoor load through the water pump, the buffer tank, the target flow switch and the distribution water heater. Taking the heating condition in winter as an example, the compressor compresses the refrigerant into high-temperature and high-pressure gas state, and the high-temperature and high-pressure gas state refrigerant enters the second channel of the plate heat exchanger to exchange heat with the water in the first channel; the water load of the first channel flows into the indoor load to realize heating.

[0044] The working process of the current air conditioning heat pump unit is: low-temperature cold water or high-temperature hot water is obtained by the air conditioning outdoor unit, and then is delivered to the indoor load side for heat exchange, thereby meeting the air conditioning demand of the user. When the air conditioning heat pump unit is not running, the water stays in the system for a long time, which can cause rust of the plate heat exchanger. Usually, the water in the system is discharged when the season changes or when it is not used for a long time, and the water is re-injected into the system before the next use cycle. The heat pump units on the market basically have anti-freezing protection, but they mainly deal with the case where the water capacity in the system is in a normal state. That is, when the machine enters the anti-freezing protection logic, the water pump and the compressor are started to circulate and warm up the water until the anti-freezing protection is exited. If the system is forgotten to be filled with water before winter or the water system pipeline is blocked, the system will be out of water or have less water, and the machine will stop after entering the anti-freezing protection and reporting a water flow fault. At this time, the small amount of water in the system can freeze the plate heat exchanger. In addition, if the machine is re-powered after power failure and then enters the anti-freezing protection and then reports a fault and stops, the service life of the water pump will be greatly reduced or even damaged by dry burning after repeated cycles.

[0045] In order to solve the problem that the plate heat exchanger of the air conditioning heat pump system using water as a medium in the prior art can be frozen, the present application provides an air conditioning heat pump system and an air conditioning heat pump unit. The following will be described in combination with Figure 1The air-conditioning heat pump system is described in detail.

[0046] As Figure 1 shown, the embodiment of the first aspect of the present application provides an air-conditioning heat pump system. The air-conditioning heat pump system comprises a first heat exchanger 110 for producing cold water or hot water; the first heat exchanger 110 comprises a first channel 111 and a second channel 112; the first channel 111 is used for water flow, and the second channel 112 is used for refrigerant flow. The refrigerant and the water exchange heat in the first heat exchanger 110 to heat or cool the water.

[0047] Preferably, the first heat exchanger 110 is preferably a plate heat exchanger. The flow channel of the plate heat exchanger is small, and the plate is corrugated, which makes the flow direction and flow rate of the fluid change constantly, increases the disturbance of the fluid, and thus achieves turbulent flow state at a small flow rate, improves the heat transfer coefficient, and has high heat transfer efficiency. The heat transfer area of the plate heat exchanger can be realized by increasing or reducing the plate, which makes it have strong adaptability.

[0048] As Figure 1 shown, further, the air-conditioning heat pump system further comprises an anti-freezing water tank 200 and a water pump 300; the water inlet of the anti-freezing water tank 200 is communicated with the water outlet of the first channel 111, and the water outlet of the anti-freezing water tank 200 is communicated with the water inlet of the first channel 111 to form an anti-freezing circulation loop; the water pump 300 is arranged between the anti-freezing water tank 200 and the first channel 111, and is used for pumping the water in the anti-freezing water tank 200 into the first channel 111.

[0049] In the embodiment, by arranging the anti-freezing water tank 200 and the water pump 300, in the case that the water amount in the system is less than the minimum water amount required for the first heat exchanger 110 to circulate, or in the case that there is no water in the system, the water pump 300 can be started to pump the water in the anti-freezing water tank 200 into the first channel 111, which can prevent the first heat exchanger 110 from being frozen and damaged, improves the reliability of the system anti-freezing, and solves the problem that the plate heat exchanger of the air-conditioning heat pump system using water as medium in the prior art can be frozen and damaged.

[0050] It can be understood that the water storage amount of the anti-freezing water tank 200 is not less than the minimum water amount required for the first heat exchanger 110 to circulate. In other words, the volume of the anti-freezing water tank 200 can be determined according to the size of the plate heat exchanger.

[0051] Further, the air conditioning heat pump system further comprises a water load 400; two interfaces of the water load 400 are communicated with the water inlet and the water outlet of the first channel 111 respectively to form the main circulation loop. By arranging the water load 400, the heat of the water load can be transmitted to a target site, for example, when the water load 400 is installed indoors, the water load 400 can provide heating or cooling for the indoor.

[0052] Specifically, the water load 400 can be a fan coil or a radiator. The fan coil is one of the terminal devices of the air conditioning system which is composed of a small fan, a motor and a coil (air heat exchanger).

[0053] Specifically, the air conditioning heat pump system further comprises a main circulation pipe 800; the main circulation pipe 800 comprises a first communication pipe 810 and a second communication pipe 820; two ends of the first communication pipe 810 are communicated with the water inlet of the first channel 111 and the water outlet of the water load 400 respectively, and two ends of the second communication pipe 820 are communicated with the water outlet of the first channel 111 and the water inlet of the water load 400 respectively. In the normal working state of the air conditioning heat pump system, the water in the main circulation loop flows out from the water outlet of the water load 400, enters the first channel 111, and then flows out from the water outlet of the first channel 111 and enters the water load 400.

[0054] Specifically, the air conditioning heat pump system further comprises a buffer water tank 900; the buffer water tank 900 is arranged between the first channel 111 and the water load 400 and is communicated with the first channel 111 and the water load 400. Specifically, the buffer water tank 900 is arranged in the first communication pipe 810 or the second communication pipe 820. By arranging the buffer water tank 900, the functions of exhaust, heat storage and pollution discharge can be achieved.

[0055] It should be noted that the anti-freezing water tank 200 can be connected to the main circulation loop or not.

[0056] Exemplarily, the water inlet end of the first channel 111 has two water inlets, a first water inlet is provided with the first anti-freezing pipe, and a second water inlet is provided with the first communication pipe; a first water valve is arranged at the first water inlet, and a second water valve is arranged at the second water inlet; when the first water valve is opened, the second water valve is closed; when the first water valve is closed, the second water valve is opened.

[0057] Exemplarily, the air conditioner heat pump system comprises a water load 400, a first anti-freezing pipe 510, a second anti-freezing pipe 520, a first valve body assembly 600 and a second valve body assembly 700; two interfaces of the water load 400 are respectively communicated with a water inlet and a water outlet of the first channel 111 to form a main circulation loop; the water outlet of the anti-freezing water tank 200 is connected to one side of the main circulation loop through the first anti-freezing pipe 510; the water inlet of the anti-freezing water tank 200 is connected to the other side of the main circulation loop through the second anti-freezing pipe 520; the water inlet of the first valve body assembly 600 is communicated with the first anti-freezing pipe 510, the first water outlet of the first valve body assembly 600 is communicated with the water inlet of the first channel 111, and the second water outlet of the first valve body assembly 600 is communicated with one interface of the water load 400; the water inlet of the second valve body assembly 700 is communicated with the water outlet of the first channel 111, the first water outlet of the second valve body assembly 700 is communicated with the water inlet of the anti-freezing water tank 200, and the second water outlet of the second valve body assembly 700 is communicated with the other interface of the water load 400.

[0058] When the system is in the anti-freezing mode, that is, there is no water in the main circulation loop or the water amount is less than the minimum water amount required for water circulation of the first heat exchanger 110, the second water outlet of the first valve body assembly 600 is closed, and the first water outlet is opened; the second water outlet of the second valve body assembly 700 is closed, and the first water outlet is opened, and the water pump 300 is started, at this time, the water in the anti-freezing water tank 200 flows into the first channel 111 of the first heat exchanger 110 through the first anti-freezing pipe 510, and then returns to the anti-freezing water tank 200 through the second anti-freezing pipe 520, forming an anti-freezing circulation loop, which can prevent the first heat exchanger 110 from being frozen.

[0059] When the system is in the normal working mode, the first water outlet of the first valve body assembly 600 and the first water outlet of the second valve body assembly 700 can be closed, and the second water outlet of the first valve body assembly 600 and the second water outlet of the second valve body assembly 700 are opened, at this time, the water in the main circulation loop flows between the first channel 111 and the water load 400, realizing heating and cooling.

[0060] It should be noted that the number of the water pump 300 is not limited in the embodiment.

[0061] In some embodiments, the number of water pumps 300 can be two. The first water pump 300 is disposed in the antifreeze circulation loop, that is, the first water pump 300 can be disposed in the first antifreeze pipe 510 or the second antifreeze pipe 520, to provide circulation power for the antifreeze circulation loop, for pumping water in the antifreeze water tank 200 into the first channel 111 of the first heat exchanger 110. The second water pump 300 is disposed in the main circulation loop, and the first water pump 300 is connected in parallel. For example, the second water pump 300 is disposed in the first connecting pipe 810 or the second connecting pipe 820, to provide circulation power for the main circulation loop, for pumping water in the buffer water tank 900 into the first channel 111.

[0062] In some other embodiments, the number of water pumps 300 is one.

[0063] like Figure 1 As shown, specifically, the water pump 300 is installed in the main circulation loop. The inlet of the first channel 111 is connected to the outlet of the antifreeze water tank 200 through the water pump 300, or the outlet of the second channel 112 is connected to the inlet of the antifreeze water tank 200 through the water pump 300. With this design, the water pump 300 can provide circulation power not only for the antifreeze circulation loop but also for the main circulation loop. Compared to a scheme using two water pumps 300 to power two separate circulation loops, this embodiment reduces costs. Furthermore, by cooperating with the first valve assembly 600 and the second valve assembly 700, the water in the antifreeze water tank 200 can participate in the main circulation loop, maintaining the water temperature in the antifreeze water tank 200, preventing the antifreeze water tank 200 from freezing, preventing the water pump 300 from dry-burning, and avoiding the need for continuous heating of the antifreeze water tank 200 by heating components, thereby reducing system energy consumption.

[0064] Specifically, when the system is in normal working condition, the water pump 300 is started, and at the same time, the first outlet and the second outlet of the first valve body assembly 600 are opened, and the first outlet and the second outlet of the second valve body assembly 700 are also opened. The water in the antifreeze water tank 200 and the water on the side of the water load 400 flow into the first channel 111, and then return to the other side of the antifreeze water tank 200 and the water load 400. At this time, the antifreeze water tank 200 can be continuously heated, thereby reducing the energy consumption of the system.

[0065] When the system is in antifreeze mode, that is, when there is no water in the main circulation loop, or the water volume is less than the minimum water volume required for the first heat exchanger 110 to circulate water, the second outlet of the first valve body assembly 600 closes and the first outlet opens; the second outlet of the second valve body assembly 700 closes and the first outlet opens, and the water pump 300 starts. At this time, the main circulation loop stops circulating, and the water in the antifreeze water tank 200 flows into the first channel 111 of the first heat exchanger 110 through the first antifreeze pipe 510, and then returns to the antifreeze water tank 200 through the second antifreeze pipe 520, forming an antifreeze circulation loop, which can prevent the first heat exchanger 110 from freezing and at the same time prevent the water pump 300 from burning dry.

[0066] Understandably, the first valve body assembly 600 can be a three-way valve or two on / off valves; the second valve body assembly 700 can be a three-way valve or two on / off valves.

[0067] like Figure 1 As shown, exemplarily, the first valve body assembly 600 includes a first switching valve 610 and a second switching valve 620; the second valve body assembly 700 includes a third switching valve 710 and a fourth switching valve 720. Specifically, the first switching valve 610 is disposed in the first antifreeze pipe 510, the second switching valve 620 is disposed in the first connecting pipe 810; the third switching valve 710 is disposed in the second antifreeze pipe 520, and the fourth switching valve 720 is disposed in the second connecting pipe 820. By controlling the on / off state of the first antifreeze pipe 510 and the first connecting pipe 810 respectively by the first switching valve 610 and the second switching valve 620, and by controlling the on / off state of the second antifreeze pipe 520 and the second connecting pipe 820 respectively by the third switching valve 710 and the fourth switching valve 720, the maintenance cost of the system can be reduced.

[0068] Specifically, the first switching valve 610 can be a check valve or a ball valve.

[0069] Specifically, the second switching valve 620 can be a check valve or a ball valve.

[0070] Specifically, the third switching valve 710 can be a check valve or a ball valve.

[0071] Specifically, the fourth switching valve 720 can be a check valve or a ball valve.

[0072] Preferably, the first switching valve 610, the second switching valve 620, the third switching valve 710, and the fourth switching valve 720 are all ball valves. Using ball valves can improve the system's response speed.

[0073] In the normal working state of the system, the water pump 300 is started, and the first, second, third and fourth switch valves 610, 620, 710 and 720 are all opened; the water in the freeze-proof water tank 200 and the water in the buffer water tank 900 are pumped by the water pump 300 to flow into the first channel 111, and then return to the freeze-proof water tank 200 and the water load 400, at this time, the freeze-proof water tank 200 can be continuously heated, thereby reducing the energy consumption of the system.

[0074] In the freeze-proof mode of the system, that is, in the case that there is no water in the main circulation loop, or the water amount is less than the minimum water amount required for water circulation of the first heat exchanger 110, the first and third switch valves 610 and 710 are opened, the second and fourth switch valves 620 and 720 are closed, and the water pump 300 is started, at this time, the main circulation loop stops circulating, the water in the freeze-proof water tank 200 flows into the first channel 111 of the first heat exchanger 110 through the first freeze-proof pipe 510, and then returns to the freeze-proof water tank 200 through the second freeze-proof pipe 520, forming a freeze-proof circulation loop, which can prevent the first heat exchanger 110 from being frozen and damaged, and prevent the water pump 300 from being dry burned.

[0075] In some embodiments, the air conditioner heat pump system further comprises a control assembly; the control assembly is electrically connected with the water pump 300, the first valve body assembly 600 and the second valve body assembly 700. Specifically, the control assembly is electrically connected with the water pump 300 for controlling the start and stop of the water pump 300; the control assembly is electrically connected with the first, second, third and fourth switch valves 610, 620, 710 and 720 for controlling the on-off of the four switch valves, so that the system can be freely switched between the freeze-proof mode and the normal working state.

[0076] In some embodiments, the air conditioner heat pump system further comprises a heating assembly (not shown in the figure); the heating assembly is arranged in the freeze-proof water tank 200 for heating the water in the freeze-proof water tank 200. By arranging the heating assembly, it can be ensured that the water in the freeze-proof water tank 200 is higher than zero degree, avoiding the freeze-proof water tank 200 from being frozen and damaged.

[0077] Further, the freeze-proof water tank 200 is provided with a sight glass window on the side. By arranging the sight glass window, it is convenient to check the water in the freeze-proof water tank 200, ensuring that the water amount in the freeze-proof water tank 200 is always not less than the minimum water amount required for circulation of the first heat exchanger 110. It is also convenient for after-sales maintenance personnel to check regularly.

[0078] In some embodiments, the air-conditioning heat pump system further comprises a heat pump outdoor unit; the heat pump outdoor unit comprises a shell 120 and a first heat exchanger 110; the first heat exchanger 110 is installed in the interior of the shell 120, and the freeze-proof water tank 200 is installed on the exterior or interior of the shell 120. By installing the freeze-proof water tank 200 on the shell 120, the distance between the freeze-proof water tank 200 and the first channel 111 can be reduced, which is conducive to the miniaturization design of the freeze-proof water tank 200 and ensures that the freeze-proof circulation loop can be quickly circulated.

[0079] It should be noted that the first freeze-proof pipe 510 and the second freeze-proof pipe 520 can be arranged in the interior of the shell 120 or on the exterior of the shell 120.

[0080] Specifically, the heat pump outdoor unit further comprises a compressor and an evaporator; the compressor and the evaporator are arranged in the interior of the shell 120; the compressor, the evaporator and the second channel 112 of the first heat exchanger 110 form a refrigerant circulation loop.

[0081] In summary, the air-conditioning heat pump system provided by the embodiment can reduce damage caused by no water or less water in the system, improve freeze-proof measures in different situations, solve the problem of limited ability of the current freeze-proof protection logic corresponding to system water side faults, improve the reliability and stability of system operation, and reduce the risk of freeze damage of the plate heat exchanger and dry burning of the water pump.

[0082] A specific embodiment of the second aspect of the utility model provides an air-conditioning heat pump unit. The air-conditioning heat pump unit comprises the air-conditioning heat pump system of any of the above embodiments.

[0083] Because the air-conditioning heat pump unit of the embodiment comprises the air-conditioning heat pump system of any of the above embodiments, it at least has the above advantages, which will not be described here.

[0084] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An air conditioning and heat pump system, comprising a first heat exchanger (110) for producing cold water or hot water; the first heat exchanger (110) comprises a first channel (111) and a second channel (112); the first channel (111) is used for water flow, and the second channel (112) is used for refrigerant flow; characterized in that, Also comprising: a freeze-proof water tank (200), a water inlet of the freeze-proof water tank (200) being communicated with a water outlet of the first channel (111), and a water outlet of the freeze-proof water tank (200) being communicated with a water inlet of the first channel (111) to form a freeze-proof circulation loop; a water pump (300) disposed between the freeze-proof water tank (200) and the first channel (111) to pump water in the freeze-proof water tank (200) into the first channel (111).

2. The air conditioning and heat pump system of claim 1, wherein, Also comprising: a water-using load (400), two interfaces of the water-using load (400) being communicated with a water inlet and a water outlet of the first channel (111) respectively to form a main circulation loop; a first freeze-proof pipe (510) through which the water outlet of the freeze-proof water tank (200) is connected to one side of the main circulation loop; a second freeze-proof pipe (520) through which the water inlet of the freeze-proof water tank (200) is connected to the other side of the main circulation loop; a first valve body assembly (600), a water inlet of the first valve body assembly (600) being communicated with the first freeze-proof pipe (510), a first water outlet of the first valve body assembly (600) being communicated with the water inlet of the first channel (111), and a second water outlet of the first valve body assembly (600) being communicated with one interface of the water-using load (400); a second valve body assembly (700), a water inlet of the second valve body assembly (700) being communicated with the water outlet of the first channel (111), a first water outlet of the second valve body assembly (700) being communicated with the water inlet of the freeze-proof water tank (200), and a second water outlet of the second valve body assembly (700) being communicated with the other interface of the water-using load (400).

3. The air conditioning and heat pump system of claim 1, wherein, Also comprising: a heating assembly disposed in the freeze-proof water tank (200) to heat water in the freeze-proof water tank (200).

4. The air conditioning and heat pump system of claim 2, wherein, The water pump (300) is disposed in the main circulation loop, and the water inlet of the first channel (111) is communicated with the water outlet of the freeze-proof water tank (200) through the water pump (300), or the water outlet of the first channel (111) is communicated with the water inlet of the freeze-proof water tank (200) through the water pump (300).

5. The air conditioning and heat pump system of claim 2, wherein, The first valve body assembly (600) comprises a first on-off valve (610) and a second on-off valve (620), and the second valve body assembly (700) comprises a third on-off valve (710) and a fourth on-off valve (720).

6. The air conditioning and heat pump system of claim 2, wherein, Also comprising: a control assembly electrically connected with the water pump (300), the first valve body assembly (600), and the second valve body assembly (700).

7. The air conditioning and heat pump system of claim 2, wherein, The water-using load (400) comprises a fan coil or a radiator.

8. The air conditioning and heat pump system of claim 1, wherein, A sight glass is disposed on a side of the freeze-proof water tank (200).

9. The air conditioning and heat pump system according to any one of claims 1 to 8, characterized in that, The first heat exchanger (110) is a plate heat exchanger.

10. An air conditioning and heat pump unit characterized by, The air conditioner heat pump system comprises any one of claims 1 to 9.

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